x402fix by AgentGate
x402 endpoint doctor for sellers: probes your paid URL unpaid (GET, HEAD, empty POST, CORS preflight; never pays) and returns a grade and a fix list. Checks the v2 PAYMENT-REQUIRED header and v1 body, every accepts entry (USDC asset, EIP-712 domain, Solana feePayer, atomic amount, payTo), multichain price consistency and the Bazaar declaration against its own JSON Schema.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
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.
Pay 0.005 USDC on Base to 0x3c1A…08d6F. The signed payment is good for 2 minutes.
- Paid to
- 0x3c1A…08d6F
- USD Coin contract
- 0x8335…02913
- Payment window
- 2 minutes
- As published
- 5000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"url": "https://api.youraitools.co/counterpartycheck/v1/lite"
}
},
"output": {
"type": "json",
"example": {
"url": "https://api.example.com/v1/data",
"tier": "lite",
"x402": {
"v1": false,
"v2": true,
"bazaar": true,
"networks": [
"Base"
],
"price_usd": 0.01
},
"fixes": [
{
"n": 1,
"id": "v2_accept_0",
"fix": "Set extra: { name: \"USD Coin\", version: \"2\" }. Signatures over the wrong domain fail verification, so every payment is rejected.",
"problem": "v2 accepts[0] (Base): EIP-712 domain \"USDC\" v2 does not match USDC on Base (\"USD Coin\" v2)",
"severity": "error"
},
{
"n": 2,
"id": "head_402",
"fix": "Answer HEAD like GET without a body (402 + PAYMENT-REQUIRED header). 402index and other directory health checks probe with HEAD and mark the endpoint down otherwise.",
"problem": "HEAD answers 405, not 402",
"severity": "warn"
},
{
"n": 3,
"id": "cors_expose",
"fix": "Send Access-Control-Allow-Origin: * and Access-Control-Expose-Headers: PAYMENT-REQUIRED, PAYMENT-RESPONSE, X-PAYMENT-RESPONSE on 402 and 200 responses.",
"problem": "Browsers cannot read the PAYMENT-REQUIRED header (not in Access-Control-Expose-Headers)",
"severity": "warn"
}
],
"grade": "C",
"score": 70,
"method": "GET",
"status": "fix_needed",
"summary": "C (70/100): x402 v2, Base. 1 error(s), 3 warning(s); first fix: v2 accepts[0] (Base): EIP-712 domain \"USDC\" v2 does not match USDC on Base (\"USD Coin\" v2)."
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"url"
],
"properties": {
"url": {
"type": "string",
"description": "Full https URL of the paid x402 route (site tier: the origin or API base URL)"
},
"method": {
"enum": [
"GET",
"POST"
],
"type": "string",
"description": "Method your paid route uses (default: from its Bazaar declaration, else GET)"
},
"framework": {
"enum": [
"hono",
"express",
"next"
],
"type": "string",
"description": "Server framework for the generated snippet (check tier, default hono)"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-24 22:11Z
- Last indexed by Roundhouse
- 2026-10-26 06:16Z
- Last enriched (probe, favicon, geo)
- —
- x402 version
- 2
- Max timeout
- 120s
- Liveness probe
- Not probed
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. 6 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 x402fix by AgentGate 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=x402fix%20by%20AgentGate' 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://api.youraitools.co/x402fix/v1/lite, 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.