ToolVet
80trust / 100

Json Query

by Forest Agent Tools in Search & web

x402 APIPassing, checked 2 h ago

Extract one bounded value from caller-supplied JSON using a deterministic simple path such as items[2].name or $.data.id. Forest performs no network request or model inference, returns an explicit found flag, and supports only dot object keys plus numeric array indexes so lookup behavior stays predictable. Base mainnet USDC

POST https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/json/query

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Status and outage history · Atom feed

Uptime
100%
Response time
50 ms typical, 242 ms slowest 5%
Last check
2 h ago
Next check
any minute now

How to call it

POST https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/json/query

Each call costs $0.001 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/json/query
content-type: application/json

{
  "json": {
    "items": [
      {
        "name": "a"
      },
      {
        "name": "b"
      }
    ]
  },
  "path": "items[1].name"
}

Parameters

ParameterTypeRequiredDescription
jsonanyYesPublic json value used to scope this lookup.
pathstringYesRepository file path whose public metadata should be checked.

Example response

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

{
  "capability": "json.query",
  "data": {
    "found": false,
    "input_bytes": 0,
    "path": "example",
    "scope": "caller_supplied_json_path_lookup_only",
    "value": null,
    "value_type": "example"
  },
  "meta": {
    "cache": "miss",
    "checked_at": "2026-01-01T00:00:00.000Z",
    "duration_ms": 0,
    "provider": "local-json"
  },
  "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 $0.001.

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/json/query' \
  -H 'content-type: application/json' \
  --data-raw '{"json":{"items":[{"name":"a"},{"name":"b"}]},"path":"items[1].name"}'

# 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/json/query' \
  -H 'content-type: application/json' \
  --data-raw '{"json":{"items":[{"name":"a"},{"name":"b"}]},"path":"items[1].name"}' \
  | 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fhttp--forest-gas-station-mainnet--lcjl27p8lmjs.code.run%2Fjson%2Fquery&method=POST
const res = await pay("https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/json/query", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "json": {
      "items": [
        {
          "name": "a"
        },
        {
          "name": "b"
        }
      ]
    },
    "path": "items[1].name"
  }),
});
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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
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/json/query",
        json={
            "json": {
                "items": [
                    {
                        "name": "a",
                    },
                    {
                        "name": "b",
                    },
                ],
            },
            "path": "items[1].name",
        },
    )
    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

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