changelog-state-api.replit.app

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "Payment of 0.01 USDC on Base or Solana is required for this resource. Re-issue this request with a PAYMENT-SIGNATURE header.",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xb23c3825de4ca8a479183092ae8d1d58d2736fc9",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
      },
      "payTo": "6UNbfD8mgSqgFDxxwE29LfgKrBqrZBt4R4L4Resh4yct",
      "amount": "10000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 120
    }
  ],
  "resource": {
    "url": "https://changelog-state-api.replit.app/api/monitors/chrome",
    "mimeType": "application/json",
    "description": "Structured recent releases for one tracked vendor.",
    "serviceName": "Changelog State API"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "pathParams": {
            "slug": "chrome"
          },
          "queryParams": {
            "limit": 10,
            "cursor": ""
          }
        },
        "output": {
          "type": "json",
          "example": {
            "name": "string",
            "slug": "string",
            "limit": 1,
            "status": "pending",
            "hasMore": false,
            "releases": [
              {
                "url": "string",
                "body": "string",
                "title": "string",
                "version": "string",
                "breaking": false,
                "entryKey": "string",
                "firstSeenAt": "2026-01-15T09:30:00.000Z",
                "publishedAt": "2026-01-15T09:30:00.000Z",
                "bodyTruncated": false,
                "breakingEvidence": "string"
              }
            ],
            "sourceUrl": "string",
            "nextCursor": "string",
            "sourceType": "github_releases",
            "homepageUrl": "string",
            "lastChangeAt": "2026-01-15T09:30:00.000Z",
            "releaseCount": 1,
            "lastCheckedAt": "2026-01-15T09:30:00.000Z",
            "lastReleaseAt": "2026-01-15T09:30:00.000Z",
            "lastSuccessAt": "2026-01-15T09:30:00.000Z",
            "headlineLookback": 1,
            "lastReleaseTitle": "string",
            "lastPrereleaseTitle": "string",
            "lastReleaseIsPrerelease": false
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "pathParams": {
                "type": "object",
                "required": [
                  "slug"
                ],
                "properties": {
                  "slug": {
                    "type": "string",
                    "example": "openai",
                    "pattern": "^[a-z0-9][a-z0-9-]*$",
                    "maxLength": 64,
                    "minLength": 1,
                    "description": "Vendor slug, lowercase alphanumeric with dashes. Take one from GET /api/monitors and substitute it into the path: `{slug}` is a placeholder, and requesting those literal characters returns 404. Worked example: GET /api/monitors/openai."
                  }
                }
              },
              "queryParams": {
                "type": "object",
                "properties": {
                  "limit": {
                    "type": "integer",
                    "default": 10,
                    "maximum": 50,
                    "minimum": 1,
                    "description": "Maximum number of release entries to return on this page. The page size, not a total: use `cursor` to walk past it."
                  },
                  "cursor": {
                    "type": "string",
                    "default": "",
                    "maxLength": 512,
                    "description": "Opaque next-page token, copied verbatim from `nextCursor` on the previous response for this same vendor. Omit it — or send the empty string — to start at the newest entry. It names a position in the newest-first order rather than an offset, so a page you have already read never shifts under you: an entry that arrives mid-walk takes the place its own publish date gives it — above the cursor, on ground you have already covered, or below it, still ahead of you — instead of renumbering every page behind it. It does not expire; a walk can be paused and resumed. Do not construct or edit one: a token that is malformed, or was issued for a different vendor, is refused with 400 and is never charged."
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "enum": [
                  "json"
                ],
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            },
            "description": "Full structured recent releases (paid)"
          }
        },
        "description": "Call shape for GET /api/monitors/{slug}."
      }
    }
  },
  "x402Version": 2
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xb23c3825de4ca8a479183092ae8d1d58d2736fc9",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 120
  }
]

Provenance

Seen in the source catalog

2026-09-09 02:01Z

Last indexed by Roundhouse

2026-09-14 18:16Z

Last enriched (probe, favicon, geo)

2026-09-14 20:16Z

x402 version

2

Max timeout

120s

Liveness probe

HTTP 402