x402 List

x402 Protocol Service Directory

●

StableEmail

AI PAYMENT-READY

payment-ready until 2026-08-20

Pay-per-send email via micropayments. AWS SES backend. Supports subdomains, inboxes, and replies. USDC on Base or Solana.

Pay from $0.02 to $5.00 in USDC on Base / Solana, settled onchain via the x402 protocol, no signup, no API key needed.

first settlement 2026-02-11 · $1.1k all-time · settled via coinbase

BASE URL https://stableemail.dev │ ENDPOINTS 3 │ NETWORK Base / Solana │ ASSET USDC │ MEMBER SINCE 2026-02-05 │ MONITORED SINCE 2026-04-15

ASSESSMENT

updated 5h ago

Evidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.

reliability 100%
uptime 24h
100%
uptime 7d
100%
uptime 30d
100%
uptime 90d
100%
response p95
519ms
avg response
271ms
total checks
7,303

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

compliance A (14/14)

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

jump to compliance checklist

price $0.02 to $5.00 (p58 in AI)
price (min)
$0.02
price (max)
$5.00
category percentile (min)
p58 in AI
category percentile (max)
p86 in AI
endpoints / prices
3 / 3
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
custom
domain created
---

Identity facts, not a risk score.

traction $21.121 30d · 55 buyers
volume 30d
$21.121
buyers 30d
55
settlements 30d
627
first settlement
2026-02-11
last settlement
2026-08-13
top buyer share
14% of 30d volume
trend 7d vs 30d
1.17x the 30d daily rate
networks
eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
volume all-time
$1.1k
settlements all-time
32,150
median settlement 30d
$0.02
max settlement 30d
$1.00
settled via
coinbase ($21.12, 627 tx)

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

Top buyer share is a concentration signal, not part of the ranking score.

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/inbox/buy Buy a managed inbox $1.00 Base/Solana USDC header
POST /api/send Send email $0.02 Base/Solana USDC header
POST /api/subdomain/buy Buy a subdomain $5.00 Base/Solana USDC header
3 endpoints

REQUEST / RESPONSE EXAMPLE

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

// request
curl -i -X POST 'https://stableemail.dev/api/inbox/buy'
// 402 response (captured by monitor) · 3 payloads · click to expand 
[
  {
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xdb5aa553feeb2c3e3d03e8360b36fb0f7e480671",
        "amount": "1000000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "2wKupLR9q6wXYppw8Gr2NvWxKBUqm4PPJKkQfoxHDBg4"
        },
        "payTo": "HvBMG7ezcwDssxXP7DPJJsveyDnvUm2wNySBR5WF2XEY",
        "amount": "1000000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://stableemail.dev/api/inbox/buy",
      "method": "POST",
      "mimeType": "application/json",
      "description": "Buy an inbox on stableemail.dev ($1, 30 days). forwardTo is optional — omit it to use as a programmatic mailbox via the messages API (retainMessages enabled automatically). Message content and attachments are retained for 90 days."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "username": "my-inbox"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "properties": {
                "body": {
                  "type": "object",
                  "$schema": "https://json-schema.org/draft/2020-12/schema",
                  "required": [
                    "username"
                  ],
                  "properties": {
                    "username": {
                      "type": "string",
                      "allOf": [
                        {
                          "pattern": "^[a-z0-9][a-z0-9-]{1,28}[a-z0-9]$"
                        },
                        {
                          "pattern": "^(?!.*--)"
                        }
                      ]
                    },
                    "forwardTo": {
                      "type": "string",
                      "format": "email",
                      "pattern": "^(?!\\.)(?!.*\\.\\.)([A-Za-z0-9_'+\\-\\.]*)[A-Za-z0-9_+-]@([A-Za-z0-9][A-Za-z0-9\\-]*\\.)+[A-Za-z]{2,}$"
                    }
                  },
                  "additionalProperties": false
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xdb5aa553feeb2c3e3d03e8360b36fb0f7e480671",
        "amount": "20000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "2wKupLR9q6wXYppw8Gr2NvWxKBUqm4PPJKkQfoxHDBg4"
        },
        "payTo": "HvBMG7ezcwDssxXP7DPJJsveyDnvUm2wNySBR5WF2XEY",
        "amount": "20000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://stableemail.dev/api/send",
      "method": "POST",
      "mimeType": "application/json",
      "description": "Send an email from \"StableEmail\" <[email protected]> ($0.02)"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {},
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "properties": {
                "body": {
                  "type": "object",
                  "$schema": "https://json-schema.org/draft/2020-12/schema",
                  "required": [
                    "to",
                    "subject"
                  ],
                  "properties": {
                    "cc": {
                      "type": "array",
                      "items": {
                        "type": "string",
                        "format": "email",
                        "pattern": "^(?!\\.)(?!.*\\.\\.)([A-Za-z0-9_'+\\-\\.]*)[A-Za-z0-9_+-]@([A-Za-z0-9][A-Za-z0-9\\-]*\\.)+[A-Za-z]{2,}$"
                      },
                      "maxItems": 50,
                      "minItems": 1
                    },
                    "to": {
                      "type": "array",
                      "items": {
                        "type": "string",
                        "format": "email",
                        "pattern": "^(?!\\.)(?!.*\\.\\.)([A-Za-z0-9_'+\\-\\.]*)[A-Za-z0-9_+-]@([A-Za-z0-9][A-Za-z0-9\\-]*\\.)+[A-Za-z]{2,}$"
                      },
                      "maxItems": 50,
                      "minItems": 1
                    },
                    "html": {
                      "type": "string",
                      "maxLength": 256000
                    },
                    "text": {
                      "type": "string",
                      "maxLength": 256000
                    },
                    "replyTo": {
                      "type": "string",
                      "format": "email",
                      "pattern": "^(?!\\.)(?!.*\\.\\.)([A-Za-z0-9_'+\\-\\.]*)[A-Za-z0-9_+-]@([A-Za-z0-9][A-Za-z0-9\\-]*\\.)+[A-Za-z]{2,}$"
                    },
                    "subject": {
                      "type": "string",
                      "maxLength": 998,
                      "minLength": 1
                    },
                    "attachments": {
                      "type": "array",
                      "items": {
                        "type": "object",
                        "required": [
                          "content",
                          "contentType",
                          "filename"
                        ],
                        "properties": {
                          "content": {
                            "type": "string",
                            "maxLength": 5000000
                          },
                          "filename": {
                            "type": "string",
                            "maxLength": 255,
                            "minLength": 1
                          },
                          "contentType": {
                            "type": "string",
                            "maxLength": 255,
                            "minLength": 1
                          }
                        },
                        "additionalProperties": false
                      },
                      "maxItems": 5
                    }
                  },
                  "additionalProperties": false
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xdb5aa553feeb2c3e3d03e8360b36fb0f7e480671",
        "amount": "5000000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "2wKupLR9q6wXYppw8Gr2NvWxKBUqm4PPJKkQfoxHDBg4"
        },
        "payTo": "HvBMG7ezcwDssxXP7DPJJsveyDnvUm2wNySBR5WF2XEY",
        "amount": "5000000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://stableemail.dev/api/subdomain/buy",
      "method": "POST",
      "mimeType": "application/json",
      "description": "Purchase a custom email subdomain on stableemail.dev ($5)"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "subdomain": "my-brand"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "properties": {
                "body": {
                  "type": "object",
                  "$schema": "https://json-schema.org/draft/2020-12/schema",
                  "required": [
                    "subdomain"
                  ],
                  "properties": {
                    "subdomain": {
                      "type": "string",
                      "allOf": [
                        {
                          "pattern": "^[a-z0-9][a-z0-9-]{1,28}[a-z0-9]$"
                        },
                        {
                          "pattern": "^(?!.*--)"
                        }
                      ]
                    }
                  },
                  "additionalProperties": false
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            }
          }
        }
      }
    },
    "x402Version": 2
  }
]

OVER TIME

All charts use the 90d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/stableemail/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
05-16 · uptime 100.0% · 346ms avg05-17 · uptime 100.0% · 342ms avg05-18 · uptime 100.0% · 327ms avg05-19 · uptime 100.0% · 356ms avg05-20 · uptime 100.0% · 469ms avg05-21 · uptime 100.0% · 461ms avg05-22 · uptime 100.0% · 494ms avg05-23 · uptime 100.0% · 460ms avg05-24 · uptime 100.0% · 464ms avg05-25 · uptime 100.0% · 511ms avg05-26 · uptime 100.0% · 494ms avg05-27 · uptime 100.0% · 505ms avg05-28 · uptime 100.0% · 495ms avg05-29 · uptime 100.0% · 485ms avg05-30 · uptime 100.0% · 470ms avg05-31 · uptime 100.0% · 450ms avg06-01 · uptime 100.0% · 474ms avg06-02 · uptime 100.0% · 521ms avg06-03 · uptime 100.0% · 491ms avg06-04 · uptime 100.0% · 475ms avg06-05 · uptime 100.0% · 516ms avg06-06 · uptime 99.6% · 465ms avg06-07 · uptime 100.0% · 431ms avg06-08 · uptime 100.0% · 419ms avg06-09 · uptime 100.0% · 453ms avg06-10 · uptime 100.0% · 445ms avg06-11 · uptime 100.0% · 436ms avg06-12 · uptime 100.0% · 398ms avg06-13 · uptime 100.0% · 334ms avg06-14 · uptime 99.6% · 373ms avg06-15 · uptime 100.0% · 316ms avg06-16 · uptime 100.0% · 367ms avg06-17 · uptime 100.0% · 362ms avg06-18 · uptime 100.0% · 434ms avg06-19 · uptime 100.0% · 424ms avg06-20 · uptime 100.0% · 496ms avg06-21 · uptime 100.0% · 472ms avg06-22 · uptime 100.0% · 477ms avg06-23 · uptime 100.0% · 509ms avg06-24 · uptime 100.0% · 506ms avg06-25 · uptime 100.0% · 562ms avg06-26 · uptime 100.0% · 588ms avg06-27 · uptime 100.0% · 492ms avg06-28 · uptime 100.0% · 342ms avg06-29 · uptime 100.0% · 352ms avg06-30 · uptime 100.0% · 395ms avg07-01 · uptime 100.0% · 385ms avg07-02 · uptime 100.0% · 376ms avg07-03 · uptime 100.0% · 296ms avg07-04 · uptime 100.0% · 293ms avg07-05 · uptime 100.0% · 294ms avg07-06 · uptime 100.0% · 296ms avg07-07 · uptime 100.0% · 308ms avg07-08 · uptime 100.0% · 302ms avg07-09 · uptime 100.0% · 328ms avg07-10 · uptime 100.0% · 292ms avg07-11 · uptime 100.0% · 278ms avg07-12 · uptime 100.0% · 304ms avg07-13 · uptime 100.0% · 282ms avg07-14 · uptime 100.0% · 296ms avg07-15 · uptime 100.0% · 303ms avg07-16 · uptime 100.0% · 296ms avg07-17 · uptime 100.0% · 273ms avg07-18 · uptime 100.0% · 235ms avg07-19 · uptime 100.0% · 237ms avg07-20 · uptime 100.0% · 223ms avg07-21 · uptime 100.0% · 228ms avg07-22 · uptime 100.0% · 208ms avg07-23 · uptime 100.0% · 224ms avg07-24 · uptime 100.0% · 234ms avg07-25 · uptime 100.0% · 263ms avg07-26 · uptime 100.0% · 234ms avg07-27 · uptime 100.0% · 229ms avg07-28 · uptime 100.0% · 245ms avg07-29 · uptime 100.0% · 260ms avg07-30 · uptime 100.0% · 262ms avg07-31 · uptime 100.0% · 272ms avg08-01 · uptime 100.0% · 276ms avg08-02 · uptime 100.0% · 290ms avg08-03 · uptime 100.0% · 312ms avg08-04 · uptime 100.0% · 279ms avg08-05 · uptime 100.0% · 363ms avg08-06 · uptime 100.0% · 283ms avg08-07 · uptime 100.0% · 276ms avg08-08 · uptime 100.0% · 298ms avg08-09 · uptime 100.0% · 374ms avg08-10 · uptime 100.0% · 289ms avg08-11 · uptime 100.0% · 286ms avg08-12 · uptime 100.0% · 257ms avg08-13 · uptime 100.0% · 306ms avg05-1608-13
90d UPTIME 100%
RESPONSE TIME
05-16 · 346ms avg05-16 · 346ms avg05-17 · 342ms avg05-17 · 342ms avg05-18 · 327ms avg05-18 · 327ms avg05-19 · 356ms avg05-19 · 356ms avg05-20 · 469ms avg05-20 · 469ms avg05-21 · 461ms avg05-21 · 461ms avg05-22 · 494ms avg05-22 · 494ms avg05-23 · 460ms avg05-23 · 460ms avg05-24 · 464ms avg05-24 · 464ms avg05-25 · 511ms avg05-25 · 511ms avg05-26 · 494ms avg05-26 · 494ms avg05-27 · 505ms avg05-27 · 505ms avg05-28 · 495ms avg05-28 · 495ms avg05-29 · 485ms avg05-29 · 485ms avg05-30 · 470ms avg05-30 · 470ms avg05-31 · 450ms avg05-31 · 450ms avg06-01 · 474ms avg06-01 · 474ms avg06-02 · 521ms avg06-02 · 521ms avg06-03 · 491ms avg06-03 · 491ms avg06-04 · 475ms avg06-04 · 475ms avg06-05 · 516ms avg06-05 · 516ms avg06-06 · 465ms avg06-06 · 465ms avg06-07 · 431ms avg06-07 · 431ms avg06-08 · 419ms avg06-08 · 419ms avg06-09 · 453ms avg06-09 · 453ms avg06-10 · 445ms avg06-10 · 445ms avg06-11 · 436ms avg06-11 · 436ms avg06-12 · 398ms avg06-12 · 398ms avg06-13 · 334ms avg06-13 · 334ms avg06-14 · 373ms avg06-14 · 373ms avg06-15 · 316ms avg06-15 · 316ms avg06-16 · 367ms avg06-16 · 367ms avg06-17 · 362ms avg06-17 · 362ms avg06-18 · 434ms avg06-18 · 434ms avg06-19 · 424ms avg06-19 · 424ms avg06-20 · 496ms avg06-20 · 496ms avg06-21 · 472ms avg06-21 · 472ms avg06-22 · 477ms avg06-22 · 477ms avg06-23 · 509ms avg06-23 · 509ms avg06-24 · 506ms avg06-24 · 506ms avg06-25 · 562ms avg06-25 · 562ms avg06-26 · 588ms avg06-26 · 588ms avg06-27 · 492ms avg06-27 · 492ms avg06-28 · 342ms avg06-28 · 342ms avg06-29 · 352ms avg06-29 · 352ms avg06-30 · 395ms avg06-30 · 395ms avg07-01 · 385ms avg07-01 · 385ms avg07-02 · 376ms avg07-02 · 376ms avg07-03 · 296ms avg07-03 · 296ms avg07-04 · 293ms avg07-04 · 293ms avg07-05 · 294ms avg07-05 · 294ms avg07-06 · 296ms avg07-06 · 296ms avg07-07 · 308ms avg07-07 · 308ms avg07-08 · 302ms avg07-08 · 302ms avg07-09 · 328ms avg07-09 · 328ms avg07-10 · 292ms avg07-10 · 292ms avg07-11 · 278ms avg07-11 · 278ms avg07-12 · 304ms avg07-12 · 304ms avg07-13 · 282ms avg07-13 · 282ms avg07-14 · 296ms avg07-14 · 296ms avg07-15 · 303ms avg07-15 · 303ms avg07-16 · 296ms avg07-16 · 296ms avg07-17 · 273ms avg07-17 · 273ms avg07-18 · 235ms avg07-18 · 235ms avg07-19 · 237ms avg07-19 · 237ms avg07-20 · 223ms avg07-20 · 223ms avg07-21 · 228ms avg07-21 · 228ms avg07-22 · 208ms avg07-22 · 208ms avg07-23 · 224ms avg07-23 · 224ms avg07-24 · 234ms avg07-24 · 234ms avg07-25 · 263ms avg07-25 · 263ms avg07-26 · 234ms avg07-26 · 234ms avg07-27 · 229ms avg07-27 · 229ms avg07-28 · 245ms avg07-28 · 245ms avg07-29 · 260ms avg07-29 · 260ms avg07-30 · 262ms avg07-30 · 262ms avg07-31 · 272ms avg07-31 · 272ms avg08-01 · 276ms avg08-01 · 276ms avg08-02 · 290ms avg08-02 · 290ms avg08-03 · 312ms avg08-03 · 312ms avg08-04 · 279ms avg08-04 · 279ms avg08-05 · 363ms avg08-05 · 363ms avg08-06 · 283ms avg08-06 · 283ms avg08-07 · 276ms avg08-07 · 276ms avg08-08 · 298ms avg08-08 · 298ms avg08-09 · 374ms avg08-09 · 374ms avg08-10 · 289ms avg08-10 · 289ms avg08-11 · 286ms avg08-11 · 286ms avg08-12 · 257ms avg08-12 · 257ms avg08-13 · 306ms avg08-13 · 306ms avg05-1608-13
AVG RESP 271ms
PRICE (captured 402, USD)
06-16 · $1.0006-27 · $1.0007-06 · $1.0008-13 · $1.00$1.0006-1608-13

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

SUB-SCORES (uptime + x402 compliance)
07-13 uptime: 100.0% compliance: 92% checks07-14 uptime: 100.0% compliance: 92% checks07-15 uptime: 100.0% compliance: 92% checks07-16 uptime: 100.0% compliance: 92% checks07-17 uptime: 100.0% compliance: 100% checks07-18 uptime: 100.0% compliance: 100% checks07-19 uptime: 100.0% compliance: 100% checks07-20 uptime: 100.0% compliance: 100% checks07-21 uptime: 100.0% compliance: 100% checks07-22 uptime: 100.0% compliance: 100% checks07-23 uptime: 100.0% compliance: 100% checks07-24 uptime: 100.0% compliance: 100% checks07-25 uptime: 100.0% compliance: 100% checks07-26 uptime: 100.0% compliance: 100% checks07-27 uptime: 100.0% compliance: 100% checks07-28 uptime: 100.0% compliance: 100% checks07-29 uptime: 100.0% compliance: 100% checks07-30 uptime: 100.0% compliance: 100% checks07-31 uptime: 100.0% compliance: 100% checks08-01 uptime: 100.0% compliance: 100% checks08-02 uptime: 100.0% compliance: 100% checks08-03 uptime: 100.0% compliance: 100% checks08-04 uptime: 100.0% compliance: 100% checks08-05 uptime: 100.0% compliance: 100% checks08-06 uptime: 100.0% compliance: 100% checks08-07 uptime: 100.0% compliance: 100% checks08-08 uptime: 100.0% compliance: 100% checks08-09 uptime: 100.0% compliance: 100% checks08-10 uptime: 100.0% compliance: 100% checks08-11 uptime: 100.0% compliance: 100% checks08-12 uptime: 100.0% compliance: 100% checks08-13 uptime: 100.0% compliance: 100% checksuptimecompliance07-1308-13

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)
05-16 · $0.4105-17 · $0.4105-18 · $0.7705-19 · $0.7105-20 · $0.4705-21 · $0.4905-22 · $205-23 · $105-24 · $0.5105-25 · $0.7305-26 · $205-27 · $205-28 · $0.5705-29 · $0.5205-30 · $0.6405-31 · $106-01 · $0.6206-02 · $0.6906-03 · $0.8506-04 · $0.5906-05 · $106-06 · $206-07 · $0.2206-08 · $0.2206-09 · $0.1606-10 · $0.2206-11 · $106-12 · $506-13 · $0.1806-14 · $0.1506-15 · $0.1806-16 · $0.3706-17 · $0.3106-18 · $106-19 · $0.5006-20 · $0.1106-21 · $0.1306-22 · $0.2406-23 · $0.2106-24 · $0.3606-25 · $0.4406-26 · $206-27 · $106-28 · $0.0606-29 · $0.5106-30 · $107-01 · $107-02 · $507-03 · $0.1507-04 · $0.0907-05 · $0.1107-06 · $0.1007-07 · $0.1607-08 · $0.3407-09 · $0.2607-10 · $0.1407-11 · $0.1207-12 · $807-13 · $107-14 · $0.2007-15 · $0.3107-16 · $0.1807-17 · $0.5007-18 · $107-19 · $0.1307-20 · $107-21 · $0.7007-22 · $0.2507-23 · $107-24 · $0.4407-25 · $0.1107-26 · $107-27 · $0.1407-28 · $0.1607-29 · $407-30 · $0.1907-31 · $0.2108-01 · $0.3808-02 · $108-03 · $0.1908-04 · $0.2508-05 · $0.3808-06 · $108-07 · $0.4708-08 · $0.5608-09 · $0.2208-10 · $0.2608-11 · $0.3608-12 · $108-13 · $1peak $805-1608-13
DISTINCT BUYERS
05-16 · 3 buyers05-17 · 5 buyers05-18 · 14 buyers05-19 · 12 buyers05-20 · 5 buyers05-21 · 8 buyers05-22 · 11 buyers05-23 · 10 buyers05-24 · 8 buyers05-25 · 6 buyers05-26 · 10 buyers05-27 · 14 buyers05-28 · 10 buyers05-29 · 6 buyers05-30 · 9 buyers05-31 · 7 buyers06-01 · 6 buyers06-02 · 8 buyers06-03 · 8 buyers06-04 · 10 buyers06-05 · 8 buyers06-06 · 10 buyers06-07 · 6 buyers06-08 · 7 buyers06-09 · 3 buyers06-10 · 7 buyers06-11 · 8 buyers06-12 · 7 buyers06-13 · 5 buyers06-14 · 4 buyers06-15 · 5 buyers06-16 · 9 buyers06-17 · 7 buyers06-18 · 11 buyers06-19 · 8 buyers06-20 · 3 buyers06-21 · 3 buyers06-22 · 7 buyers06-23 · 7 buyers06-24 · 9 buyers06-25 · 8 buyers06-26 · 8 buyers06-27 · 6 buyers06-28 · 2 buyers06-29 · 7 buyers06-30 · 12 buyers07-01 · 8 buyers07-02 · 5 buyers07-03 · 7 buyers07-04 · 4 buyers07-05 · 5 buyers07-06 · 4 buyers07-07 · 4 buyers07-08 · 6 buyers07-09 · 9 buyers07-10 · 5 buyers07-11 · 4 buyers07-12 · 5 buyers07-13 · 5 buyers07-14 · 7 buyers07-15 · 8 buyers07-16 · 6 buyers07-17 · 12 buyers07-18 · 8 buyers07-19 · 6 buyers07-20 · 9 buyers07-21 · 11 buyers07-22 · 5 buyers07-23 · 9 buyers07-24 · 8 buyers07-25 · 4 buyers07-26 · 7 buyers07-27 · 5 buyers07-28 · 7 buyers07-29 · 9 buyers07-30 · 5 buyers07-31 · 9 buyers08-01 · 9 buyers08-02 · 5 buyers08-03 · 5 buyers08-04 · 6 buyers08-05 · 4 buyers08-06 · 9 buyers08-07 · 5 buyers08-08 · 6 buyers08-09 · 4 buyers08-10 · 4 buyers08-11 · 4 buyers08-12 · 6 buyers08-13 · 7 buyerspeak 14 buyers05-1608-13

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-07-06 · last up 2026-08-13

  • 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
● OK 219ms
● OK 256ms
● OK 302ms
● OK 267ms
● OK 323ms
● OK 250ms
● OK 263ms
● OK 204ms
● OK 345ms
● OK 164ms
● OK 289ms
● OK 229ms
● OK 237ms
● OK 238ms
● OK 302ms
● OK 270ms
● OK 263ms
● OK 384ms
18 of 7,349 checks · live count

EMBED THIS BADGE

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

StableEmail listed on x402-list
status
StableEmail uptime on x402-list
live uptime
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// HTML · live uptime variant
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