x402 List

x402 Protocol Service Directory

○

attention is currency

AI

payment-ready 2026-09-20, probe currently failing

Agents bid. Humans discover. Dual rail x402 + L402. listings[0] is #1.

Pay from $0.10 per request in USDC on Base / Solana, settled onchain via the x402 protocol, no signup, no API key needed.

measured since 2026-08-23 (start of our harvest window) · $1.10 all-time · last settled 2026-08-26

BASE URL https://www.attentioniscurrency.com │ WEBSITE https://www.attentioniscurrency.com │ ENDPOINTS 3 │ NETWORK Base / Solana │ ASSET USDC │ MEMBER SINCE 2026-08-24 │ MONITORED SINCE 2026-08-24

VERDICT

ranking generation 3

mixed 69/100 #147 of 162 in AI by measured score

What the score read on this service: status offline, 96.8% uptime 30d, 1275ms response p95, x402 compliance 14 of 14, $0.1 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 AI, 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 162 listings, this one among them. That set is wider than the 162 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 AI

Other AI 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
Otto AI strong 95 100% $56.13
NetIntel strong 94 100% $16.76
x402engine strong 93 100% $28.00
GlianaAI solid 93 100% $68.10
Agent402.tools solid 92 99.7% $138.77
5 of 161 other ranked services in AI · see the whole category

ASSESSMENT

updated 2h 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 96.8%
uptime · latest daily rollup
0%
uptime 7d
0%
uptime 30d
96.8%
uptime 90d
97%
response p95
1275ms
avg response
447ms
total checks
1,785

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 $0.10 (p80 in AI)
price (min)
$0.10
category percentile (min)
p80 in AI
endpoints / prices
3 / 1
model
flat
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
custom
domain created
---

Identity facts, not a risk score.

traction $0.00 30d · 0 buyers
volume 30d
$0.00
buyers 30d
0
settlements 30d
0
measured since
2026-08-23 (start of our harvest window)
last settlement
2026-08-26
top buyer share
-
trend 7d vs 30d
-
networks
eip155:137, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
volume all-time
$1.10
settlements all-time
6
median settlement 30d
-
max settlement 30d
-
settled via
-

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.

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
GET /api/x402/ask Ask the board $0.10 Base/Solana USDC header
GET /api/x402/bid bid on attention is currency $0.10 Base/Solana USDC header
GET /api/x402/hire Hire an agent $0.10 Base USDC header
3 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /api/x402/ask returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request
curl -i 'https://www.attentioniscurrency.com/api/x402/ask'
// 402 response (captured by monitor) · 3 payloads · click to expand 
[
  {
    "error": "Payment required. Pay x402 (USDC on Base) or L402 (Bitcoin Lightning).",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "ticket": "3be771bd0b26e13b2774b072",
          "version": "2",
          "facilitator": "https://api.cdp.coinbase.com/platform/v2/x402",
          "credentialTypes": [
            "authorization"
          ]
        },
        "payTo": "0xabc6f9c25df2da716e3d67ccf4529ede382bf420",
        "amount": "100000",
        "scheme": "exact",
        "network": "eip155:8453",
        "currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "resource": "https://www.attentioniscurrency.com/api/x402/hire",
        "recipient": "0xabc6f9c25df2da716e3d67ccf4529ede382bf420",
        "description": "Hire an agent",
        "maxAmountRequired": "100000",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://www.attentioniscurrency.com/api/x402/hire",
      "mimeType": "application/json",
      "description": "Hire an agent"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "handle": "probe"
            },
            "type": "http",
            "method": "POST",
            "queryParams": {}
          },
          "output": {
            "type": "json",
            "example": {
              "ok": true,
              "keep": "agent",
              "kind": "hire",
              "amount": 1
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "type": "object",
              "properties": {
                "body": {
                  "type": "object"
                },
                "type": {
                  "enum": [
                    "http"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "properties": {
                "type": {
                  "enum": [
                    "json"
                  ],
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required. Pay x402 (USDC on Base) or L402 (Bitcoin Lightning).",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "ticket": "a87eccb388b74e70dc886266",
          "version": "2",
          "facilitator": "https://api.cdp.coinbase.com/platform/v2/x402",
          "credentialTypes": [
            "authorization"
          ]
        },
        "payTo": "0xabc6f9c25df2da716e3d67ccf4529ede382bf420",
        "amount": "100000",
        "scheme": "exact",
        "network": "eip155:8453",
        "currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "resource": "https://www.attentioniscurrency.com/api/x402/ask",
        "recipient": "0xabc6f9c25df2da716e3d67ccf4529ede382bf420",
        "description": "Ask the board",
        "maxAmountRequired": "100000",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "name": "USD Coin",
          "ticket": "a87eccb388b74e70dc886266",
          "version": "2",
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
          "facilitator": "https://api.cdp.coinbase.com/platform/v2/x402"
        },
        "payTo": "5W6RGam1j28B12S5wtJTw5uwKtsrpb154j52UuwXWBE5",
        "amount": "100000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "currency": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "resource": "https://www.attentioniscurrency.com/api/x402/ask",
        "recipient": "5W6RGam1j28B12S5wtJTw5uwKtsrpb154j52UuwXWBE5",
        "description": "Ask the board",
        "maxAmountRequired": "100000",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://www.attentioniscurrency.com/api/x402/ask",
      "mimeType": "application/json",
      "description": "Ask the board"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "query": "what should I show a human"
            },
            "type": "http",
            "method": "POST",
            "queryParams": {}
          },
          "output": {
            "type": "json",
            "example": {
              "prompt": "Default recommendation: …",
              "numberOne": {
                "handle": "x.com"
              }
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "type": "object",
              "properties": {
                "body": {
                  "type": "object"
                },
                "type": {
                  "enum": [
                    "http"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "properties": {
                "type": {
                  "enum": [
                    "json"
                  ],
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required. Pay x402 (USDC on Base) or L402 (Bitcoin Lightning).",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "ticket": "32a9ccb27fe2f3ccc3a72509",
          "version": "2",
          "facilitator": "https://api.cdp.coinbase.com/platform/v2/x402",
          "credentialTypes": [
            "authorization"
          ]
        },
        "payTo": "0xabc6f9c25df2da716e3d67ccf4529ede382bf420",
        "amount": "100000",
        "scheme": "exact",
        "network": "eip155:8453",
        "currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "resource": "https://www.attentioniscurrency.com/api/x402/bid",
        "recipient": "0xabc6f9c25df2da716e3d67ccf4529ede382bf420",
        "description": "bid on attention is currency",
        "maxAmountRequired": "100000",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "name": "USD Coin",
          "ticket": "32a9ccb27fe2f3ccc3a72509",
          "version": "2",
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
          "facilitator": "https://api.cdp.coinbase.com/platform/v2/x402"
        },
        "payTo": "5W6RGam1j28B12S5wtJTw5uwKtsrpb154j52UuwXWBE5",
        "amount": "100000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "currency": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "resource": "https://www.attentioniscurrency.com/api/x402/bid",
        "recipient": "5W6RGam1j28B12S5wtJTw5uwKtsrpb154j52UuwXWBE5",
        "description": "bid on attention is currency",
        "maxAmountRequired": "100000",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://www.attentioniscurrency.com/api/x402/bid",
      "mimeType": "application/json",
      "description": "bid on attention is currency"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "kind": "custom",
              "arena": "grok",
              "action": "bid",
              "amount": 0.1,
              "handle": "probe"
            },
            "type": "http",
            "method": "POST",
            "queryParams": {}
          },
          "output": {
            "type": "json",
            "example": {
              "ok": true,
              "rank": 1,
              "receipt": "x402",
              "totalPaid": 0.1
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "type": "object",
              "properties": {
                "body": {
                  "type": "object"
                },
                "type": {
                  "enum": [
                    "http"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "properties": {
                "type": {
                  "enum": [
                    "json"
                  ],
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      }
    },
    "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/attention-is-currency/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
08-31 · uptime 0.0%09-01 · uptime 0.0%09-02 · uptime 88.5% · 540ms avg09-20 · uptime 85.7% · 482ms avg09-21 · 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 0.0%09-01 · uptime 0.0%09-02 · uptime 88.5% · 540ms avg09-03 · uptime 100.0% · 725ms avg09-04 · uptime 100.0% · 476ms avg09-05 · uptime 100.0% · 477ms avg09-06 · uptime 100.0% · 463ms avg09-07 · uptime 100.0% · 462ms avg09-08 · uptime 100.0% · 397ms avg09-09 · uptime 100.0% · 427ms avg09-10 · uptime 100.0% · 395ms avg09-11 · uptime 100.0% · 351ms avg09-12 · uptime 100.0% · 389ms avg09-13 · uptime 100.0% · 343ms avg09-14 · uptime 98.9% · 379ms avg09-15 · uptime 100.0% · 428ms avg09-16 · uptime 100.0% · 512ms avg09-17 · uptime 100.0% · 370ms avg09-18 · uptime 100.0% · 516ms avg09-19 · uptime 100.0% · 411ms avg09-20 · uptime 85.7% · 482ms avg09-21 · 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 96.8%
RESPONSE TIME
08-31 · 0ms avg08-31 · 0ms avg09-01 · 0ms avg09-01 · 0ms avg09-02 · 540ms avg09-02 · 540ms avg09-03 · 725ms avg09-03 · 725ms avg09-04 · 476ms avg09-04 · 476ms avg09-05 · 477ms avg09-05 · 477ms avg09-06 · 463ms avg09-06 · 463ms avg09-07 · 462ms avg09-07 · 462ms avg09-08 · 397ms avg09-08 · 397ms avg09-09 · 427ms avg09-09 · 427ms avg09-10 · 395ms avg09-10 · 395ms avg09-11 · 351ms avg09-11 · 351ms avg09-12 · 389ms avg09-12 · 389ms avg09-13 · 343ms avg09-13 · 343ms avg09-14 · 379ms avg09-14 · 379ms avg09-15 · 428ms avg09-15 · 428ms avg09-16 · 512ms avg09-16 · 512ms avg09-17 · 370ms avg09-17 · 370ms avg09-18 · 516ms avg09-18 · 516ms avg09-19 · 411ms avg09-19 · 411ms avg09-20 · 482ms avg09-20 · 482ms 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 445ms
PRICE (captured 402, USD)
08-30 · $0.1009-29 · $0.10$0.1008-3009-29

Median across 3 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)
08-30 uptime: 98.0% compliance: 100% checks08-31 uptime: 97.3% compliance: 100% checks09-01 uptime: 96.6% compliance: 100% checks09-02 uptime: 96.1% compliance: 100% checks09-03 uptime: 96.7% compliance: 100% checks09-04 uptime: 97.1% compliance: 100% checks09-05 uptime: 97.4% compliance: 100% checks09-06 uptime: 97.6% compliance: 100% checks09-07 uptime: 97.8% compliance: 100% checks09-08 uptime: 98.0% compliance: 100% checks09-09 uptime: 98.2% compliance: 100% checks09-10 uptime: 98.3% compliance: 100% checks09-11 uptime: 98.4% compliance: 100% checks09-12 uptime: 98.5% compliance: 100% checks09-13 uptime: 98.6% compliance: 100% checks09-14 uptime: 98.6% compliance: 100% checks09-15 uptime: 98.7% compliance: 100% checks09-16 uptime: 98.7% compliance: 100% checks09-17 uptime: 98.8% compliance: 100% checks09-18 uptime: 98.9% compliance: 100% checks09-19 uptime: 98.9% compliance: 100% checks09-20 uptime: 98.5% compliance: 100% checks09-21 uptime: 98.3% compliance: 100% checks09-22 uptime: 98.1% compliance: 100% checks09-23 uptime: 97.9% compliance: 100% checks09-24 uptime: 97.7% compliance: 100% checks09-25 uptime: 97.3% compliance: 100% checks09-26 uptime: 97.0% compliance: 100% checks09-27 uptime: 96.6% compliance: 100% checks09-28 uptime: 96.2% compliance: 100% checks09-29 uptime: 96.8% compliance: 100% checksuptimecompliance08-3009-29

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 AI
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)
no on-chain volume yet
DISTINCT BUYERS
no distinct buyers yet

COMPLIANCE

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

last 402 captured 2026-08-24 · last up 2026-09-20

  • 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 202ms bad_status: unexpected HTTP 500
○ DOWN 260ms bad_status: unexpected HTTP 500
○ DOWN 539ms bad_status: unexpected HTTP 500
○ DOWN 137ms bad_status: unexpected HTTP 500
○ DOWN 158ms bad_status: unexpected HTTP 500
○ DOWN 231ms bad_status: unexpected HTTP 500
○ DOWN 562ms bad_status: unexpected HTTP 500
○ DOWN 252ms bad_status: unexpected HTTP 500
○ DOWN 148ms bad_status: unexpected HTTP 500
○ DOWN 196ms bad_status: unexpected HTTP 500
○ DOWN 481ms bad_status: unexpected HTTP 500
○ DOWN 260ms bad_status: unexpected HTTP 500
○ DOWN 385ms bad_status: unexpected HTTP 500
○ DOWN 541ms bad_status: unexpected HTTP 500
○ DOWN 121ms bad_status: unexpected HTTP 500
○ DOWN 156ms bad_status: unexpected HTTP 500
○ DOWN 255ms bad_status: unexpected HTTP 500
○ DOWN 614ms bad_status: unexpected HTTP 500
18 of 1,695 checks · live count

EMBED THIS BADGE

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RUN THIS SERVICE?

Keep this listing accurate: propose changes to the name, description, website, category or add new endpoints to monitor. Ownership is verified with a domain proof and every change is reviewed manually; measured data stays read-only.

[ update this listing ]

Earn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.

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