← The evidence ledger
Evidence row 426819
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://www.carsonbot402.dev/api/ask
- Recorded
- Previous row
- #417516
- Body SHA-256
- a481c98fdc85b962f7f0394b219a25a2eec8a84467eee72362a71799aabd99f5
- Leaf
- 0xcbbc6f83ab6613975ca6e1b1124bdc16bd72dda5223388bf20462c7830a86f6a
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": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"
},
"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"
}
}
},
"lastUpdated": "2026-10-27T06:37:11.306Z",
"quality": {
"l30DaysTotalCalls": 3,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-10-27T06:37:11.001Z"
},
"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":"a481c98fdc85b962f7f0394b219a25a2eec8a84467eee72362a71799aabd99f5","id":426819,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793086309191482,"prev":417516,"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 (273461 rows).
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- Day root
- 0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795
- Chained
- 0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4
- Published
- On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4