← The evidence ledger
Evidence row 751358
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://www.carsonbot402.dev/api/ask
- Recorded
- Previous row
- #527904
- Body SHA-256
- d5d2540d1bacd47cc717a6f0ba6e317a6e288f6e2813542250a2d926c477d961
- Leaf
- 0x1b6e0be432f5930de11754f8d3d645aebe74d8af67165d06ded9bb401c0b5e1f
What was observed
{
"endpoints": [
[
"x402",
"https://www.carsonbot402.dev/api/ask"
]
],
"name": "www.carsonbot402.dev/api/ask",
"owner_address": "0xb8024fc57e656c759fc874a79e79d8db142e80e3",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb8024Fc57E656c759fc874A79E79d8db142E80E3",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "FyN2heBBuFWTfjvxNXQjjuT5UTZVPvFfMiE7N5qtpWkV",
"scheme": "exact"
}
],
"description": "x402 debugging/troubleshooting Q&A: Ask any question, get a cited answer. Whether you need HTTP 402 Payment Required help, facilitator verify & settle (CDP @coinbase/cdp-sdk), Bazaar discovery metadata & listing, protocol documentation, Next.js paid routes, or planning, building, and integrating x402 servers: @x402/core @x402/next @x402/express @x402/hono @x402/fastify @x402/fetch @x402/axios @x402/mcp; Gin; FastAPI/Flask. Base & Solana USDC.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"question": "How do I debug x402 facilitator verify and settle failures after HTTP 402 Payment Required on Base, and attach Bazaar discovery metadata to a Next.js paid POST route?"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"answer": "Check that PAYMENT-REQUIRED advertises exact USDC on the network you paid, that verify uses the facilitator client (@coinbase/cdp-sdk) with matching scheme/network/asset, and that settle runs only after verify succeeds [1]. For Bazaar listing, register the bazaar extension on your route config so the 402 body includes input/output schemas agents can read [2].",
"citationMap": {
"1": {
"citationIndex": 0
},
"2": {
"citationIndex": 1
}
},
"citations": [
{
"endLine": 80,
"label": "typescript/packages/http/next/README.md#L1-L80",
"path": "typescript/packages/http/next/README.md",
"startLine": 1,
"url": "https://github.com/x402-foundation/x402/blob/main/typescript/packages/http/next/README.md#L1-L80"
},
{
"endLine": 40,
"label": "docs/extensions/bazaar.mdx#L1-L40",
"path": "docs/extensions/bazaar.mdx",
"startLine": 1,
"url": "https://github.com/x402-foundation/x402/blob/main/docs/extensions/bazaar.mdx#L1-L40"
}
],
"requestId": "req_0123456789abcdefghij"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"audience": {
"description": "Optional RAG tag filter: audience dimension (see config/rag-tag-vocabulary).",
"type": "string"
},
"contentType": {
"description": "Optional RAG tag filter: content-type dimension (guides, reference, etc.).",
"type": "string"
},
"question": {
"description": "Natural-language x402 question (debugging, troubleshooting, protocol, facilitator verify/settle, Bazaar listing, integrations).",
"maxLength": 2000,
"minLength": 1,
"type": "string"
}
},
"required": [
"question"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"answer": {
"description": "Cited prose answer grounded in indexed x402 docs and examples.",
"type": "string"
},
"citationMap": {
"additionalProperties": {
"properties": {
"citationIndex": {
"type": "number"
}
},
"required": [
"citationIndex"
],
"type": "object"
},
"description": "Maps answer footnote keys to citations[] indexes.",
"type": "object"
},
"citations": {
"description": "Source snippets referenced by bracket markers in answer.",
"items": {
"properties": {
"endLine": {
"type": "number"
},
"label": {
"type": "string"
},
"path": {
"type": "string"
},
"startLine": {
"type": "number"
},
"url": {
"type": "string"
}
},
"required": [
"label",
"path",
"url",
"startLine",
"endLine"
],
"type": "object"
},
"type": "array"
},
"requestId": {
"description": "Internal ask interaction id (req_ prefix), not a model provider id.",
"type": "string"
}
},
"required": [
"answer",
"citations",
"citationMap",
"requestId"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"sign-in-with-x": {
"info": {
"domain": "www.carsonbot402.dev",
"expirationTime": "2026-10-28T06:29:14.544Z",
"issuedAt": "2026-10-28T06:24:14.544Z",
"nonce": "028a94b6ca4a1ec7ba21ec2dc7872c5e",
"resources": [
"https://www.carsonbot402.dev/api/ask"
],
"statement": "Sign in to CarsonBot402 Ask with the wallet paying for this question.",
"uri": "https://www.carsonbot402.dev/api/ask",
"version": "1"
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"address": {
"type": "string"
},
"chainId": {
"type": "string"
},
"domain": {
"type": "string"
},
"expirationTime": {
"format": "date-time",
"type": "string"
},
"issuedAt": {
"format": "date-time",
"type": "string"
},
"nonce": {
"type": "string"
},
"notBefore": {
"format": "date-time",
"type": "string"
},
"requestId": {
"type": "string"
},
"resources": {
"items": {
"format": "uri",
"type": "string"
},
"type": "array"
},
"signature": {
"type": "string"
},
"statement": {
"type": "string"
},
"type": {
"type": "string"
},
"uri": {
"format": "uri",
"type": "string"
},
"version": {
"type": "string"
}
},
"required": [
"domain",
"address",
"uri",
"version",
"chainId",
"type",
"nonce",
"issuedAt",
"signature"
],
"type": "object"
},
"supportedChains": [
{
"chainId": "eip155:8453",
"type": "eip191"
},
{
"chainId": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"type": "ed25519"
}
]
}
},
"lastUpdated": "2026-10-28T06:24:14.562Z",
"quality": {
"l30DaysTotalCalls": 5,
"l30DaysUniquePayers": 3,
"lastCalledAt": "2026-10-28T06:24:14.168Z"
},
"resource": "https://www.carsonbot402.dev/api/ask",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "x402 debugging/troubleshooting Q&A: Ask any question, get a cited answer. Whether you need HTTP 402 Payment Required help, facilitator verify & settle (CDP @coinbase/cdp-sdk), Bazaar discovery metadata & listing, protocol documentation, Next.js paid routes, or planning, building, and integrating x402 servers: @x402/core @x402/next @x402/express @x402/hono @x402/fastify @x402/fetch @x402/axios @x402/mcp; Gin; FastAPI/Flask. Base & Solana USDC."
}What the leaf hashes
{"body":"d5d2540d1bacd47cc717a6f0ba6e317a6e288f6e2813542250a2d926c477d961","id":751358,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793178748437491,"prev":527904,"subject":"x402_bazaar:https://www.carsonbot402.dev/api/ask","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (231336 rows).
- 0x1b6e05fcb574e408c16e2b8207ec3e44c9ba50d4cebcdfe07167bed9d613ab6f
- 0x2612aaaee43b6917220d70008e0101ac79dd5e4aa4132dc3a5dd1dce9e348faa
- 0x3eb47cdf085337775578d32173149f0ce8336d78739eefe72fd776cb8a76a9ba
- 0x5605fa17af0902b518accc9b1007b27043768d690f0ad7a48288e0c76553e32c
- 0x469895ff1f24e5089e7487ab5443e749e8e77bfed4fec93239a93f8c84a82348
- 0xdabbd3b1e7d490a82f9b62513624d740b82e30875c85bb0461f42db05a3b55de
- 0x074a527c08c45a3916145108fbcf461c8df505a076a6a86ff74c53e4061fd88e
- 0x18f62501c6393d1442d41b71744ab95d396cfc6f92f7d98d21361d79b5f1da58
- 0xb9c1d7a8900dfe0b76e152f3356dcbcac77b52a0820197d12eee0c56c7861119
- 0x4b63327ad93a2d34f0e95ad32d69de04c74af1a47017cf7715510f4216fc47aa
- 0x543703f77ed7ba357ad12619764e4710f9da9ac435d2ced14e66dbc4e989b3b9
- 0x8a692f6d7e9044ae4f3557816b5c04ad18ad62316f5a863bc187300dbcfa02ff
- 0xaeeae4466766a65cd22fc29006507aa614269d1921fdace8a2ed483f4b0aa51f
- 0xa45c19ee1ddfa3971a75affe2da0c01e0a09406bb4b50c48e0d9cf0e082801a3
- 0x4698ebc7cbcb2286f661b867355eb6a9183e884482ee16965889e886b17d19ac
- 0x35e8995c30094446ec790423171382fccb377081b921295b0ae3840cc2c4f52c
- 0xf078ea7d84d98dbeffed23d8e67b36751e60464ffd4cfdc005e0aa6f8cb9b459
- 0xe027395fafb7fc41921c42ca0542524ea22204cbd5908b70b27f3d5fb26f5d0f
- Day root
- 0x2c19037464cc4c493624565f01775d6446fc78eaa118fc6865bfe2bfca9ff78e
- Chained
- 0xd1d7dee8322ceff8f4c8d83aa1fe4a4466825c2af1c97dbde3d35db61234f7be
- Published
- On Arc Testnet, block 69584042: 0x8bae2b1d097834c8b458513862d70d29ee807e98dc2e863b27250131c15b35ae