CarsonBot402 Ask
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.
DataLiveeip155:8453Exactvia cdp
x402DebuggingBazaarCdpQa
Calls · 30d
128
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 13 snapshots so far.
$1.32
Verified settled volume
127 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
Listed price
As published in the catalog. Always read the live 402 before paying.
129
Calls · 30d
Upstream's own call count for this endpoint, not ours.
8
Unique payers · 30d
Last called 2026-11-08 11:50Z
—
Upstream on-chain volume
0 transactions, checked 2026-10-29 09:46Z
Paid to
0xb8024Fc57E656c759fc874A79E79d8db142E80E3The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.01USDC≈ $0.01 USD
on Base · exact scheme
Pay 0.01 USDC on Base to 0xb802…E80E3. The signed payment is good for 5 minutes.
- Paid to
- 0xb802…E80E3
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 10000 smallest units
10000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- J6a6TR…ydQ3A
- Token contract
- EPjFWd…TDt1v
- Payment window
- 5 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xb8024Fc57E656c759fc874A79E79d8db142E80E3",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"
},
"payTo": "J6a6TRKm51VH4TCwEVsoAkFwKAS33rTLS2PM1uWydQ3A",
"amount": "10000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
]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?"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"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].",
"citations": [
{
"url": "https://github.com/x402-foundation/x402/blob/main/typescript/packages/http/next/README.md#L1-L80",
"path": "typescript/packages/http/next/README.md",
"label": "typescript/packages/http/next/README.md#L1-L80",
"endLine": 80,
"startLine": 1
},
{
"url": "https://github.com/x402-foundation/x402/blob/main/docs/extensions/bazaar.mdx#L1-L40",
"path": "docs/extensions/bazaar.mdx",
"label": "docs/extensions/bazaar.mdx#L1-L40",
"endLine": 40,
"startLine": 1
}
],
"requestId": "req_0123456789abcdefghij",
"citationMap": {
"1": {
"citationIndex": 0
},
"2": {
"citationIndex": 1
}
},
"conversationId": "00000000-0000-4000-8000-000000000001"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"question"
],
"properties": {
"audience": {
"type": "string",
"description": "Optional RAG tag filter: audience dimension (see config/rag-tag-vocabulary)."
},
"question": {
"type": "string",
"maxLength": 2000,
"minLength": 1,
"description": "Natural-language x402 question (debugging, troubleshooting, protocol, facilitator verify/settle, Bazaar listing, integrations)."
},
"contentType": {
"type": "string",
"description": "Optional RAG tag filter: content-type dimension (guides, reference, etc.)."
},
"conversation": {
"type": [
"object",
"null"
],
"properties": {
"id": {
"type": "string",
"format": "uuid",
"description": "Opaque conversation ID returned by a previous paid Ask."
},
"steer": {
"type": "object",
"properties": {
"roles": {
"type": "array",
"items": {
"enum": [
"developer",
"product",
"operator",
"reviewer",
"agent"
],
"type": "string"
},
"maxItems": 10,
"uniqueItems": true
},
"chains": {
"type": "array",
"items": {
"enum": [
"evm",
"base",
"solana",
"multi"
],
"type": "string"
},
"maxItems": 10,
"uniqueItems": true
},
"audiences": {
"type": "array",
"items": {
"enum": [
"builder",
"product",
"agent",
"operator",
"evaluator"
],
"type": "string"
},
"maxItems": 10,
"uniqueItems": true
},
"languages": {
"type": "array",
"items": {
"enum": [
"typescript",
"python",
"go",
"solidity",
"multi"
],
"type": "string"
},
"maxItems": 10,
"uniqueItems": true
}
},
"additionalProperties": false
},
"title": {
"type": "string",
"maxLength": 160,
"minLength": 1
}
},
"description": "Optional payer-owned chat context. Omit or set null to start a new conversation. Supply only id to continue one; title and steer patch its state.",
"additionalProperties": false
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"answer",
"citations",
"citationMap",
"requestId",
"conversationId"
],
"properties": {
"answer": {
"type": "string",
"description": "Cited prose answer grounded in indexed x402 docs and examples."
},
"citations": {
"type": "array",
"items": {
"type": "object",
"required": [
"label",
"path",
"url",
"startLine",
"endLine"
],
"properties": {
"url": {
"type": "string"
},
"path": {
"type": "string"
},
"label": {
"type": "string"
},
"endLine": {
"type": "number"
},
"startLine": {
"type": "number"
}
}
},
"description": "Source snippets referenced by bracket markers in answer."
},
"requestId": {
"type": "string",
"description": "Internal ask interaction id (req_ prefix), not a model provider id."
},
"citationMap": {
"type": "object",
"description": "Maps answer footnote keys to citations[] indexes.",
"additionalProperties": {
"type": "object",
"required": [
"citationIndex"
],
"properties": {
"citationIndex": {
"type": "number"
}
}
}
},
"conversationId": {
"type": "string",
"format": "uuid",
"description": "Resolved payer-owned conversation ID. Reuse it to continue this chat."
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-11-08 11:50Z
- Last indexed by Roundhouse
- 2026-11-09 17:50Z
- Last enriched (probe, favicon, geo)
- 2026-10-29 09:45Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 405
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 13 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service CarsonBot402 Ask and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=CarsonBot402%20Ask' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://www.carsonbot402.dev/api/ask, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.