ToolVet
80trust / 100

Openapi Operation Contract

by Forest Web in Onchain & crypto

x402 APIPassing, checked 54 min ago

Inspect the declared request and response contract for one exact OpenAPI or Swagger operation before integration. Returns parameters, request-body content types, response statuses/content types and declared security scheme names without executing the endpoint or resolving external references. Base mainnet USDC

POST https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/openapi/operation-contract

Last 30 days

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed

Uptime
100%
Response time
123 ms typical, 279 ms slowest 5%
Last check
54 min ago
Next check
any minute now

How to call it

POST https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/openapi/operation-contract

Each call costs $0.003 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/openapi/operation-contract
content-type: application/json

{
  "method": "POST",
  "path": "/widgets",
  "url": "https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/openapi.json"
}

Parameters

ParameterTypeRequiredDescription
methodstringYesHTTP method for the bounded public probe. One of: GET, POST, PUT, PATCH, DELETE, HEAD, OPTIONS, TRACE.
pathstringYesRepository file path whose public metadata should be checked.
urlstringYesPublic HTTP(S) URL to inspect, resolve, or compare.

Example response

The provider's example. We can't check it without paying.

Example response, 39 lines
{
  "capability": "openapi.operation-contract",
  "data": {
    "contract": {
      "deprecated": false,
      "detail_available": false,
      "method": "example",
      "operation_id": "example",
      "parameters": [],
      "path": "example",
      "request_body": {
        "content_types": [],
        "required": false
      },
      "responses": [],
      "security_schemes": [],
      "security_source": "operation"
    },
    "detail_state": "available",
    "found": false,
    "operation_count": 0,
    "parse_valid": false,
    "requested": {
      "method": "example",
      "path": "example"
    },
    "scope": "bounded_contract_metadata_only_no_operation_execution",
    "url": "example",
    "version": "example"
  },
  "meta": {
    "cache": "miss",
    "checked_at": "2026-01-01T00:00:00.000Z",
    "duration_ms": 0,
    "provider": "openapi-parser"
  },
  "ok": true,
  "version": "1"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.003.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/openapi/operation-contract' \
  -H 'content-type: application/json' \
  --data-raw '{"method":"POST","path":"/widgets","url":"https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/openapi.json"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/openapi/operation-contract' \
  -H 'content-type: application/json' \
  --data-raw '{"method":"POST","path":"/widgets","url":"https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/openapi.json"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.003 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.003" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.003 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fhttp--forest-gas-station-mainnet--lcjl27p8lmjs.code.run%2Fopenapi%2Foperation-contract&method=POST
const res = await pay("https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/openapi/operation-contract", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "method": "POST",
    "path": "/widgets",
    "url": "https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/openapi.json"
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.003 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.003"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/openapi/operation-contract",
        json={
            "method": "POST",
            "path": "/widgets",
            "url": "https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/openapi.json",
        },
    )
    print(res.status_code, res.text)

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
54 min agoPassed402184 ms$0.003
5 h agoPassed402123 ms$0.003
9 h agoPassed402279 ms$0.003
13 h agoPassed40241 ms$0.003
17 h agoPassed402250 ms$0.003
21 h agoPassed40238 ms$0.003
25 h agoPassed40240 ms$0.003
28 h agoPassed40236 ms$0.003
32 h agoPassed402133 ms$0.003
35 h agoPassed402119 ms$0.003
39 h agoPassed40245 ms$0.003
42 h agoPassed40238 ms$0.003
46 h agoPassed402218 ms$0.003
2 days agoPassed402282 ms$0.003
2 days agoPassed402123 ms$0.003