← The evidence ledger
Evidence row 1508260
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://www.carsonbot402.dev/api/ask
- Recorded
- Previous row
- #1261485
- Body SHA-256
- 5f4c8dabccc0dad4ea2b8092efef39e0f63b32803109771f5bded54f69c4659a
- Leaf
- 0xf4536d291b84107f09d578fd7fe6eae67a4aedfaf2aaf44621892e4180004c4d
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": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"
},
"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": "2026-10-31T00:18:26.125Z",
"quality": {
"l30DaysTotalCalls": 122,
"l30DaysUniquePayers": 6,
"lastCalledAt": "2026-10-31T00:18:25.948Z"
},
"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":"5f4c8dabccc0dad4ea2b8092efef39e0f63b32803109771f5bded54f69c4659a","id":1508260,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793472709115231,"prev":1261485,"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 (246033 rows).
- 0xf4536daf15b21012345e6d1ade41bfa6259f793e45acc698025267b34b6c12a8
- 0x0db4a7f9ce0a868d4ba97b4457e33adab5d7fde9eefb5a4ea8effff9aa977367
- 0xae296e3c71a02d7610d2b470dcb94f29db2622b098f34be65c581680882f0d01
- 0xc80ba03dde81d5f833622868a31c43b1541544d642600a0b3f070e5f9faade78
- 0xd2dee016a20485cd2abb613353db39e877cdeed8be1332828447aeb9c8084b7d
- 0xb0e492db8a2fd328fef94a00c2675ed8077f1088e129b2eb8bb2e11043806626
- 0x5591197d64e20a4b4f88593efa0df89704b3640cd1f11c7d99a45d4d4588fa39
- 0xdeae9e34d7c7e93ae96ba2eba7517910ce42d73a9a97af36da007cea134e1479
- 0x34ccec7c5f9898406e1ee6f65061ba9787b05b6accbb3fb6cd0aa769331e7079
- 0xa7d37760f64aa290240f9ec399db3f7c272d3bf286dd8a1ab3b943e9b6e273e8
- 0xfb414f397bf261659331f25e87b3f2adfc83b26217e512e6ed94261399f32f7d
- 0xc6a372780b5af570c9fabec485e08bf61b0b444515ef7024eeebb43178091de1
- 0x35aeb2af720d62e4e729c2722ba5be89b317dd41ceb7710fd363aea93b412c29
- 0xb9926eb0976a5b473833dada1e63c048bf8ef05dbd747135d29c85140274baf8
- 0xe9e97d8cdaf19b6da06606a22b4eea548063df6bacb661abea4c37aa637b5c3b
- 0x4befbbd74452b2a3a89b7e1e809ba011f1be78aeb8153059503fda47c454d086
- 0xa1146af524f673843507e7427a575964580eef01bc0e0eae466a7920df017ab2
- 0x0504a25438f3c7932125463198ca74c5064f23f71a5c92763b3fc96a98cc8b57
- Day root
- 0x24463725d1c0d9894bd6123691d532547aaa79f0762c0e45aa6a68acf1fd71ab
- Chained
- 0x7d4824ff313dee7252a46f9d5c37b452851deb6c9f24a40c2f74ee0e53c82980
- Published
- On Arc Testnet, block 70093156: 0xedb7b832f4ebf6781b5ecd2ed241c435b862f4d3761541fa31adc1831b8c44a0