ToolVet
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Openapi Operation Index

by Delx OpenAPI Operation Index in Onchain & crypto

x402 APIPassing, checked 28 min ago

Turn an OpenAPI document into a compact operation index for planning and tool selection. Use it before an autonomous workflow acts on untrusted input, changes an API, retries a request, or evaluates production reliability. Returns bounded machine-readable JSON for $0.002 USDC via x402 on Base or Solana. Execution is deterministic, first-party, local-only, stateless, and does not call an upstream provider; structured validation failures are not billed.

POST
https://api.delx.ai/api/v1/x402/openapi-operation-index
Price
$0.002
per call in USDC
Uptime
100%
last 30 days
Response time
10 ms
52 ms slowest 5%
Last check
Passed
28 min ago, next in 5 min

Run a free test callHow to call it

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How to call it

POST https://api.delx.ai/api/v1/x402/openapi-operation-index

Each call costs $0.002 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://api.delx.ai/api/v1/x402/openapi-operation-index
content-type: application/json

{
  "spec": {
    "info": {
      "title": "Jobs API"
    },
    "openapi": "3.1.0",
    "paths": {
      "/jobs": {
        "get": {
          "operationId": "listJobs",
          "summary": "List jobs"
        }
      }
    }
  }
}

Parameters

ParameterTypeRequiredDescription
specobjectYesOpenAPI JSON document.

Example response

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

{
  "operation_count": 1,
  "operations": [
    {
      "deprecated": false,
      "method": "GET",
      "operation_id": "listJobs",
      "path": "/jobs",
      "summary": "List jobs",
      "tags": []
    }
  ],
  "schema": "delx/openapi-operation-index/v1",
  "title": "Jobs API",
  "truncated": false
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.002.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.delx.ai/api/v1/x402/openapi-operation-index' \
  -H 'content-type: application/json' \
  --data-raw '{"spec":{"info":{"title":"Jobs API"},"openapi":"3.1.0","paths":{"/jobs":{"get":{"operationId":"listJobs","summary":"List jobs"}}}}}'

# 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://api.delx.ai/api/v1/x402/openapi-operation-index' \
  -H 'content-type: application/json' \
  --data-raw '{"spec":{"info":{"title":"Jobs API"},"openapi":"3.1.0","paths":{"/jobs":{"get":{"operationId":"listJobs","summary":"List jobs"}}}}}' \
  | 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 $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
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 $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.delx.ai%2Fapi%2Fv1%2Fx402%2Fopenapi-operation-index&method=POST
const res = await pay("https://api.delx.ai/api/v1/x402/openapi-operation-index", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "spec": {
      "info": {
        "title": "Jobs API"
      },
      "openapi": "3.1.0",
      "paths": {
        "/jobs": {
          "get": {
            "operationId": "listJobs",
            "summary": "List jobs"
          }
        }
      }
    }
  }),
});
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 $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://api.delx.ai/api/v1/x402/openapi-operation-index",
        json={
            "spec": {
                "info": {
                    "title": "Jobs API",
                },
                "openapi": "3.1.0",
                "paths": {
                    "/jobs": {
                        "get": {
                            "operationId": "listJobs",
                            "summary": "List jobs",
                        },
                    },
                },
            },
        },
    )
    print(res.status_code, res.text)

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