x402 List

x402 Protocol Service Directory

○

PennyRail

Compute

payment-ready 2026-09-10, probe currently failing

Agent transaction router for paid machine services. Agents discover and quote capabilities for free, then pay per execution with x402 USDC on Base. Includes live web search, AI, data, and deterministic utilities with OpenAPI and MCP discovery.

Pay from $0.001 to $0.02 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

measured since 2026-08-31 (start of our harvest window) · $0.19 all-time · settled via coinbase

paid probe: delivered (HTTP 200) on 2026-08-31

BASE URL https://pennyrail.vercel.app │ WEBSITE https://pennyrail.vercel.app │ ENDPOINTS 56 │ NETWORK Base │ ASSET USDC │ MEMBER SINCE 2026-08-31 │ MONITORED SINCE 2026-08-31

VERDICT

ranking generation 3

mixed 75/100 #13 of 16 in Compute by measured score

What the score read on this service: status offline, 91.9% uptime 30d, 329ms response p95, x402 compliance 14 of 14, $0.001 price against the category, on-chain traction measured. Each of those is measured, and each is published in full below.

The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.

It is a score inside Compute, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 16 listings, this one among them. That set is wider than the 16 the position above is counted against, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.

Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.

ALTERNATIVES IN COMPUTE

Other Compute services in this directory, ordered by the same measured score. The figures are ours: 30-day uptime from our own probes, 30-day settlement volume read on-chain (a conservative undercount, and null where we cannot measure it, never a zero).

Ranked alternative x402 services in the same category, with band, measured score, 30-day uptime and 30-day on-chain settlement volume
SERVICE BAND SCORE UPTIME 30D VOL 30D
QuickNode solid 89 100% $0
Cloud World Model solid 88 99.9% $0.92
Coprocesseur déterministe solid 87 100% $0.002
agent-exec solid 86 99.9% $0
Shehriyars API solid 86 100% $0.002
5 of 15 other ranked services in Compute · see the whole category

ASSESSMENT

updated 4h ago

The parts the verdict above is computed from, each with its proof. Click any chip. Measured values stay read-only; unknown is honest, and an unknown is never counted as a zero.

reliability 91.9%
uptime · latest daily rollup
-
uptime 7d
0%
uptime 30d
91.9%
uptime 90d
91.9%
response p95
329ms
avg response
256ms
total checks
994

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

compliance A (14/14), stale (probe failing)

14 of 14 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.001 to $0.02 (p22 in Compute)
price (min)
$0.001
price (max)
$0.02
category percentile (min)
p22 in Compute
category percentile (max)
p58 in Compute
endpoints / prices
56 / 5
model
tiered
stability
100%
risk clean

No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.

domain age
-
registrar
-
hosting
free host
domain created
---

Identity facts, not a risk score.

traction $0.177 30d · 5 buyers
volume 30d
$0.177
buyers 30d
5
settlements 30d
65
measured since
2026-08-31 (start of our harvest window)
last settlement
2026-09-08
top buyer share
49% of 30d volume (address, not entity)
trend 7d vs 30d
0.00x the 30d daily rate
networks
eip155:8453
volume all-time
$0.19
settlements all-time
65
median settlement 30d
$0.001
max settlement 30d
$0.05
settled via
coinbase ($0.18, 65 tx)

Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.

Top buyer share is part of the ranking score: a higher share lowers the traction part of the score, by up to half when one address holds all 30d volume.

CHANGES

1 in 30d

Payout, price, and schema changes detected on this service's x402 wire. A payout rotation at an unchanged price shows up here even when nothing else moves. Full feed at /changes.

changes schema changed 26d ago (1 in 30d)

schema changed · 26d ago

endpoint added POST /api/bazaar/web-search

endpoint added POST /api/router/execute/intel

endpoint added POST /api/router/execute/micro

endpoint added POST /api/router/execute/nano

endpoint added POST /api/router/execute/premium

endpoint added POST /api/router/execute/standard

schema added POST /api/bazaar/web-search exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added POST /api/router/execute/intel exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added POST /api/router/execute/micro exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added POST /api/router/execute/nano exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added POST /api/router/execute/premium exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

schema added POST /api/router/execute/standard exact eip155:8453 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 USDC 2 300 {"name":"USD Coin","version":"2"}

see all changes for this service

WHAT IT DOES

ai-derived

No AI synthesis has been produced for this service yet.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD PATH DESCRIPTION PRICE NETWORK ASSET 402 CHANNEL
POST /api/bazaar/web-search $0.02 Base USDC header
POST /api/f/country.lookup $0.001 Base USDC header
POST /api/f/crypto.sha256 $0.001 Base USDC header
POST /api/f/dns.a $0.001 Base USDC header
POST /api/f/encoding.base64-decode $0.001 Base USDC header
POST /api/f/encoding.base64-encode $0.001 Base USDC header
POST /api/f/encoding.hex-decode $0.001 Base USDC header
POST /api/f/encoding.hex-encode $0.001 Base USDC header
POST /api/f/encoding.url-decode $0.001 Base USDC header
POST /api/f/encoding.url-encode $0.001 Base USDC header
POST /api/f/fx.convert $0.001 Base USDC header
POST /api/f/github.repo $0.001 Base USDC header
POST /api/f/json.flatten $0.001 Base USDC header
POST /api/f/json.get $0.001 Base USDC header
POST /api/f/json.keys $0.001 Base USDC header
POST /api/f/json.omit $0.001 Base USDC header
POST /api/f/json.pick $0.001 Base USDC header
POST /api/f/json.sort-keys $0.001 Base USDC header
POST /api/f/npm.latest $0.001 Base USDC header
POST /api/f/number.clamp $0.001 Base USDC header
POST /api/f/number.percent-change $0.001 Base USDC header
POST /api/f/number.round $0.001 Base USDC header
POST /api/f/number.stats $0.001 Base USDC header
POST /api/f/number.sum $0.001 Base USDC header
POST /api/f/text.char-count $0.001 Base USDC header
POST /api/f/text.extract-emails $0.001 Base USDC header
POST /api/f/text.extract-urls $0.001 Base USDC header
POST /api/f/text.lines-dedupe $0.001 Base USDC header
POST /api/f/text.lines-sort $0.001 Base USDC header
POST /api/f/text.lowercase $0.001 Base USDC header
POST /api/f/text.normalize-whitespace $0.001 Base USDC header
POST /api/f/text.remove-empty-lines $0.001 Base USDC header
POST /api/f/text.reverse $0.001 Base USDC header
POST /api/f/text.slugify $0.001 Base USDC header
POST /api/f/text.truncate $0.001 Base USDC header
POST /api/f/text.uppercase $0.001 Base USDC header
POST /api/f/text.word-frequency $0.001 Base USDC header
POST /api/f/time.diff-seconds $0.001 Base USDC header
POST /api/f/time.to-iso $0.001 Base USDC header
POST /api/f/time.to-unix $0.001 Base USDC header
POST /api/f/url.domain $0.001 Base USDC header
POST /api/f/url.json-to-query $0.001 Base USDC header
POST /api/f/url.normalize $0.001 Base USDC header
POST /api/f/url.parse $0.001 Base USDC header
POST /api/f/url.query-to-json $0.001 Base USDC header
POST /api/f/url.resolve $0.001 Base USDC header
POST /api/f/validation.email $0.001 Base USDC header
POST /api/f/validation.uuid $0.001 Base USDC header
POST /api/router/execute/intel $0.005 Base USDC header
POST /api/router/execute/micro $0.004 Base USDC header
POST /api/router/execute/nano $0.001 Base USDC header
POST /api/router/execute/premium $0.02 Base USDC header
POST /api/router/execute/standard $0.01 Base USDC header
POST /api/tools/json-canonicalize $0.001 Base USDC header
GET /api/tools/strip-tracking $0.001 Base USDC header
GET /api/tools/text-stats $0.001 Base USDC header
56 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /api/tools/strip-tracking returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request
curl -i 'https://pennyrail.vercel.app/api/tools/strip-tracking'
// 402 response (captured by monitor) · 56 payloads · click to expand 
[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/time.to-iso",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "20000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/bazaar/web-search",
      "mimeType": "application/json",
      "description": "Live web search for AI agents. Pay $0.02 USDC on Base and receive a grounded answer plus sources."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "count": 5,
              "query": "latest x402 agent commerce news",
              "freshness": "pw"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "ok": true,
              "title": "Live web search",
              "result": {
                "answer": "Grounded answer from current web results.",
                "sources": [
                  {
                    "url": "https://example.com",
                    "title": "Example source"
                  }
                ]
              },
              "priceUsd": 0.02,
              "productId": "web.search"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "properties": {
                "body": {
                  "type": "object",
                  "properties": {
                    "q": {
                      "type": "string",
                      "minLength": 1,
                      "description": "Alias for query."
                    },
                    "count": {
                      "type": "integer",
                      "maximum": 10,
                      "minimum": 1
                    },
                    "query": {
                      "type": "string",
                      "minLength": 1,
                      "description": "Natural-language web search query."
                    },
                    "country": {
                      "type": "string"
                    },
                    "freshness": {
                      "enum": [
                        "pd",
                        "pw",
                        "pm",
                        "py"
                      ],
                      "type": "string"
                    }
                  },
                  "additionalProperties": true
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "20000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/router/execute/premium",
      "mimeType": "application/json",
      "description": "PennyRail universal router execution: premium capability."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/router/execute/standard",
      "mimeType": "application/json",
      "description": "PennyRail universal router execution: standard capability."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "5000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/router/execute/intel",
      "mimeType": "application/json",
      "description": "PennyRail universal router execution: intelligence capability."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "4000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/router/execute/micro",
      "mimeType": "application/json",
      "description": "PennyRail universal router execution: micro capability."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/router/execute/nano",
      "mimeType": "application/json",
      "description": "PennyRail universal router execution: nano capability."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/validation.email",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/text.extract-urls",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/text.lowercase",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/encoding.hex-encode",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/fx.convert",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/npm.latest",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/dns.a",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/github.repo",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
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        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/tools/text-stats",
      "mimeType": "application/json",
      "description": "Deterministic text counts: characters, words, sentences, estimated reading seconds."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/text.reverse",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/json.keys",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/tools/strip-tracking",
      "mimeType": "application/json",
      "description": "Remove common advertising/tracking query parameters from an absolute URL."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/number.stats",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/text.extract-emails",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/text.lines-dedupe",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/validation.uuid",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0B53378117E82b50aFBA71d794A21c22C7E36D2c",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://pennyrail.vercel.app/api/f/time.to-unix",
      "mimeType": "application/json",
      "description": "Run one PennyRail machine utility."
    },
    "x402Version": 2
  }
]

OVER TIME

All charts use the 30d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/pennyrail/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.

UPTIME
09-10 · uptime 92.1% · 181ms avg09-11 · uptime 0.0%09-12 · uptime 0.0%09-13 · uptime 0.0%09-14 · uptime 0.0%09-15 · uptime 0.0%09-16 · uptime 0.0%09-17 · uptime 0.0%09-18 · uptime 0.0%09-19 · uptime 0.0%09-20 · uptime 0.0%09-21 · uptime 0.0%09-22 · uptime 0.0%09-23 · uptime 0.0%09-24 · uptime 0.0%09-25 · uptime 0.0%09-26 · uptime 0.0%09-27 · uptime 0.0%09-28 · uptime 0.0%09-29 · uptime 0.0%08-31 · uptime 100.0% · 282ms avg09-01 · uptime 100.0% · 277ms avg09-02 · uptime 100.0% · 310ms avg09-03 · uptime 100.0% · 259ms avg09-04 · uptime 100.0% · 264ms avg09-05 · uptime 100.0% · 276ms avg09-06 · uptime 100.0% · 319ms avg09-07 · uptime 100.0% · 253ms avg09-08 · uptime 100.0% · 197ms avg09-09 · uptime 100.0% · 214ms avg09-10 · uptime 92.1% · 181ms avg09-11 · uptime 0.0%09-12 · uptime 0.0%09-13 · uptime 0.0%09-14 · uptime 0.0%09-15 · uptime 0.0%09-16 · uptime 0.0%09-17 · uptime 0.0%09-18 · uptime 0.0%09-19 · uptime 0.0%09-20 · uptime 0.0%09-21 · uptime 0.0%09-22 · uptime 0.0%09-23 · uptime 0.0%09-24 · uptime 0.0%09-25 · uptime 0.0%09-26 · uptime 0.0%09-27 · uptime 0.0%09-28 · uptime 0.0%09-29 · uptime 0.0%08-3109-29
30D UPTIME 91.8%
RESPONSE TIME
08-31 · 282ms avg08-31 · 282ms avg09-01 · 277ms avg09-01 · 277ms avg09-02 · 310ms avg09-02 · 310ms avg09-03 · 259ms avg09-03 · 259ms avg09-04 · 264ms avg09-04 · 264ms avg09-05 · 276ms avg09-05 · 276ms avg09-06 · 319ms avg09-06 · 319ms avg09-07 · 253ms avg09-07 · 253ms avg09-08 · 197ms avg09-08 · 197ms avg09-09 · 214ms avg09-09 · 214ms avg09-10 · 181ms avg09-10 · 181ms avg09-11 · 0ms avg09-11 · 0ms avg09-12 · 0ms avg09-12 · 0ms avg09-13 · 0ms avg09-13 · 0ms avg09-14 · 0ms avg09-14 · 0ms avg09-15 · 0ms avg09-15 · 0ms avg09-16 · 0ms avg09-16 · 0ms avg09-17 · 0ms avg09-17 · 0ms avg09-18 · 0ms avg09-18 · 0ms avg09-19 · 0ms avg09-19 · 0ms avg09-20 · 0ms avg09-20 · 0ms avg09-21 · 0ms avg09-21 · 0ms avg09-22 · 0ms avg09-22 · 0ms avg09-23 · 0ms avg09-23 · 0ms avg09-24 · 0ms avg09-24 · 0ms avg09-25 · 0ms avg09-25 · 0ms avg09-26 · 0ms avg09-26 · 0ms avg09-27 · 0ms avg09-27 · 0ms avg09-28 · 0ms avg09-28 · 0ms avg09-29 · 0ms avg09-29 · 0ms avg08-3109-29
AVG RESP 256ms
PRICE (captured 402, USD)
08-31 · $0.00109-02 · $0.00109-29 · $0.001$0.00108-3109-29

Median across 56 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)
08-31 uptime: 100.0% compliance: 100% checks09-01 uptime: 100.0% compliance: 100% checks09-02 uptime: 100.0% compliance: 100% checks09-03 uptime: 100.0% compliance: 100% checks09-04 uptime: 100.0% compliance: 100% checks09-05 uptime: 100.0% compliance: 100% checks09-06 uptime: 100.0% compliance: 100% checks09-07 uptime: 100.0% compliance: 100% checks09-08 uptime: 100.0% compliance: 100% checks09-09 uptime: 100.0% compliance: 100% checks09-10 uptime: 100.0% compliance: 100% checks09-11 uptime: 98.7% compliance: 100% checks09-12 uptime: 98.3% compliance: 100% checks09-13 uptime: 97.8% compliance: 100% checks09-14 uptime: 97.3% compliance: 100% checks09-15 uptime: 96.9% compliance: 100% checks09-16 uptime: 96.5% compliance: 100% checks09-17 uptime: 96.1% compliance: 100% checks09-18 uptime: 95.7% compliance: 100% checks09-19 uptime: 95.4% compliance: 100% checks09-20 uptime: 95.0% compliance: 100% checks09-21 uptime: 94.6% compliance: 100% checks09-22 uptime: 94.2% compliance: 100% checks09-23 uptime: 93.8% compliance: 100% checks09-24 uptime: 93.4% compliance: 100% checks09-25 uptime: 93.0% compliance: 100% checks09-26 uptime: 92.6% compliance: 100% checks09-27 uptime: 92.2% compliance: 100% checks09-28 uptime: 91.9% compliance: 100% checks09-29 uptime: 91.9% compliance: 100% checksuptimecompliance08-3109-29

checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression

PILLARS OVER TIME (measured)
price percentile in Compute
site signals present (of 6)

Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.

VOLUME (on-chain settlement, USD)
08-31 · $0.0409-02 · $0.0509-03 · $0.0209-06 · $0.0509-08 · $0.03peak $0.0508-3109-08
DISTINCT BUYERS
08-31 · 2 buyers09-02 · 1 buyer09-03 · 1 buyer09-06 · 1 buyer09-08 · 1 buyerpeak 2 buyers08-3109-08

COMPLIANCE

14/14 checks pass · grade A · stale (probe failing)

last 402 captured 2026-09-02 · last up 2026-09-10

  • 402 payload captured
  • accepts[] array present
  • payTo address recoverable
  • payTo at accepts[0].payTo (conformant shape)
  • payTo is a valid on-chain address
  • atomic price declared
  • atomic price in a sane range
  • asset (token) address declared
  • network resolves to CAIP-2
  • payment scheme declared
  • served over HTTPS
  • declares the current x402 version (2)
  • EIP-712 domain parameters present on every EVM entry
  • x402 v2 envelope delivered in the payment-required header

SITE PILLARS

  • homepage reachable
  • openapi doc
  • pricing page
  • llms.txt
  • robots.txt
  • terms page
recent checks (18) live · click to expand
TIME STATUS RESP CAUSE
○ DOWN 10ms bad_status: unexpected HTTP 503
○ DOWN 18ms bad_status: unexpected HTTP 503
○ DOWN 14ms bad_status: unexpected HTTP 503
○ DOWN 28ms bad_status: unexpected HTTP 503
○ DOWN 132ms bad_status: unexpected HTTP 503
○ DOWN 20ms bad_status: unexpected HTTP 503
○ DOWN 16ms bad_status: unexpected HTTP 503
○ DOWN 11ms bad_status: unexpected HTTP 503
○ DOWN 13ms bad_status: unexpected HTTP 503
○ DOWN 50ms bad_status: unexpected HTTP 503
○ DOWN 116ms bad_status: unexpected HTTP 503
○ DOWN 14ms bad_status: unexpected HTTP 503
○ DOWN 19ms bad_status: unexpected HTTP 503
○ DOWN 17ms bad_status: unexpected HTTP 503
○ DOWN 42ms bad_status: unexpected HTTP 503
○ DOWN 13ms bad_status: unexpected HTTP 503
○ DOWN 32ms bad_status: unexpected HTTP 503
○ DOWN 77ms bad_status: unexpected HTTP 503
18 of 995 checks · live count

EMBED THIS BADGE

Show that PennyRail is monitored on x402-list. Paste this on your site or README, it links back to this live listing.

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// HTML · live uptime variant
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</a>

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