← The evidence ledger
Evidence row 1261485
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://www.carsonbot402.dev/api/ask
- Recorded
- Previous row
- #1038623
- Body SHA-256
- 5e8b3739a4b5aca88097db0e2cefb0202c718d5e0d8e3bf07940f21205996cbd
- Leaf
- 0x0bbef6adcde480d9a2b6abc8f5c5810535906290d5d09dfc83f1b04869bd43bf
What was observed
{
"endpoints": [
[
"x402",
"https://www.carsonbot402.dev/api/ask"
]
],
"name": "CarsonBot402 Ask",
"owner_address": "0xb8024fc57e656c759fc874a79e79d8db142e80e3",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb8024Fc57E656c759fc874A79E79d8db142E80E3",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "J6a6TRKm51VH4TCwEVsoAkFwKAS33rTLS2PM1uWydQ3A",
"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"
}
}
},
"iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1793384849/bazaar-icons/9d06f7a15a4c09c0.png",
"lastUpdated": "2026-10-30T18:27:29.059Z",
"quality": {
"l30DaysTotalCalls": 9,
"l30DaysUniquePayers": 5,
"lastCalledAt": "2026-10-29T16:19:10.086Z"
},
"resource": "https://www.carsonbot402.dev/api/ask",
"serviceName": "CarsonBot402 Ask",
"tags": [
"x402",
"debugging",
"bazaar",
"cdp",
"qa"
],
"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":"5e8b3739a4b5aca88097db0e2cefb0202c718d5e0d8e3bf07940f21205996cbd","id":1261485,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793385511900217,"prev":1038623,"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 (243099 rows).
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- 0xe7fb906c25a4ea187abb713db6e9dccbea0158bc50d669f8e138e7b59674ea37
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- 0x0229dfed062fd7bf0bb2bb0681ac7a9751abdedae9d7404be3a784031cf3d845
- 0x0e866e2a2f1c0f575f938f78ba2aac4ce1cd719c4be63efa8856316cee4bc40d
- 0xb6315b559aafc338211e693bdca326e4eb823ea2f5048d28f759261788b9286a
- 0xda007be0df410de39b4f8e3a0fe7d3d5e067ee2a36511146de9d4d5a05949282
- 0x61c26f9a47692f1b3e019f5149abbd15602903823d4958fdc21a4079655faf96
- 0xbd8bc7bc33376b119c2c5e6654028ee1cfd6b2456cd2daeb8944ee21f29a927e
- 0xfb571edac469d8a35eaf8be5965a4d77f405e1e5f70e575090257d3f57c85c82
- 0xacd21bf8041582e8791f6e79698ec1264c10b9229f5ffd89bac316decd7c11c0
- 0x1f2184b945f9592992fad320892719c98f8361a3144b92d89525abd90034c0c2
- 0x07a3338ff82774d53d7b3eb537fe113270a3edf37254cd960efb7d6d3a7745cd
- 0xdf5b016e08f93664d06694a7722324dcb27caedd549f286f07d4b4798e0c706e
- 0x2b7a05865245feaf40ea40b73e02d86357af2dcbac9c7b992f1420f5eaa15246
- 0xe2a9872e1b6a01c55a7a8cc5c05c61f3933255db5c26b9c79be4011d28685b52
- 0xb0c9ef42e725578748f3119c9dbebf2fc437266bda013df29f98ed3ebe621403
- 0x30a81d8fcef4e8f9e2877c62796cfc5612fc1b251127d531dee28f8dbd5c5147
- Day root
- 0x0826c7ad6039e06a2360ca0a4a3a4fe7f2626c6dc19f71a37599386f78b39875
- Chained
- 0x36b4c8a1063758f0b8765fa1bdf75fa92fb543cc183add3e261880ee2bd1f822
- Published
- On Arc Testnet, block 69923247: 0x8704744146c6967c8abc9e9a99de4db7283b29e840922ea83a69b6fe776e6861