← The evidence ledger
Evidence row 1038623
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://www.carsonbot402.dev/api/ask
- Recorded
- Previous row
- #751358
- Body SHA-256
- ec979332c3ac896f2d169396453164115dedd87131fea44647e7faf073f18e21
- Leaf
- 0xd0c841765c7d30ee815b76ee11930bdc73247a0d85814cc15513e0ab2ca4428f
What was observed
{
"endpoints": [
[
"x402",
"https://www.carsonbot402.dev/api/ask"
]
],
"name": "www.carsonbot402.dev/api/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": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
},
"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": "2026-10-29T16:24:10.504Z",
"issuedAt": "2026-10-29T16:19:10.504Z",
"nonce": "6114c6f9344e26500b4af173488a871e",
"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": "2026-10-29T16:19:10.523Z",
"quality": {
"l30DaysTotalCalls": 9,
"l30DaysUniquePayers": 5,
"lastCalledAt": "2026-10-29T16:19:10.086Z"
},
"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":"ec979332c3ac896f2d169396453164115dedd87131fea44647e7faf073f18e21","id":1038623,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793298273230566,"prev":751358,"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 (242798 rows).
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- 0xb6c1d259dfd94c2b48608d6edfdddf12714d9202e26c866f377fefc862497231
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- 0xe6a8e213e16e6837deb35c6b621ae19da0e3bd94745a4f5a1c336b065e527bf6
- 0x9bff177d983adb72c55d87d0e04577a715c29a1a65fa4dc2ae85eeea554c8b80
- 0x781006cd166830dd62b5dceccaf0a464cb3d5ab951d5e1bc79a87fa6708f3be9
- 0x8cc24016447a6bbf12e267d402c30a3b94b9de48a5bd3ea98a9610b1308af5a3
- 0x6c67f3be2eea0fd540735a1e6d7fb80beb520e7f06681a493a8d4313e3d768b0
- 0x960e4f0ff5fec13d05199aed10ca90f5d1839d90e79811727d52a26492767684
- 0x84812c4863d0e3b3914ecc11e6fad49d5218673de18589f4a10b6912e806029c
- 0xc97f9ca1690a256b5313a10010b4ea8484679d0abc57b41f3d92c8da489beb10
- 0xd42c3cf08d79b560e8593d38317f3aa803bf452a29e5aef441985ce52af98494
- 0xbf8fb9ae04cd855672b7933285af02945215feadfca3baf523311e54a3b873ab
- 0xc5f320d911e4e74a5ef306d3473fe072ea90372c9b9d8902795503f6d18cc307
- 0xa7d3fa0a08edea990614977b51a6b3289c357a88d8ca06dcbfe67415a017c0e7
- 0xa034ebc8d117fbf1ed466b70baa0478bf213b743e1a41cba1d2da7a9f310184d
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- 0xe01539ac4c9f9cdf265a9e5c6d99c8da11e70ff0c7175fb23e402d33b9d79785
- Day root
- 0xc050555c6b023f2aefb6536efb9f0760b92c30a0d06c572b7daf63db259ea17c
- Chained
- 0x4cde8bae2042512e1bec11650628f0293556311cc4ea74d99ffddf02b671a7d6
- Published
- On Arc Testnet, block 69753317: 0x9e85c340732f416e431b111fae72f7624870125f7f379af2732eb6c2ba8cf6a1