ToolVet
80trust / 100

Blob Decode

by Forest Agent Tools in Developer tools

x402 APIPassing, checked 4 h ago

Identify and unwrap a bounded caller-supplied opaque string into readable JSON, text or binary evidence using deterministic local rules for JWT payloads, canonical Base64/Base64URL and gzip. Ambiguous hex/Base64 representations stop in auto mode; canonical hex and Brotli can be selected only through explicit bounded hints. JWT claims are decode-only and always marked unverified. Base mainnet USDC

POST https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/blob/decode

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
50 ms typical, 194 ms slowest 5%
Last check
4 h ago
Next check
any minute now

How to call it

POST https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/blob/decode

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/blob/decode
content-type: application/json

{
  "blob": "eyJhbGciOiJub25lIiwidHlwIjoiSldUIn0.eyJqb2IiOiJidWlsZC00MiIsInN0YXR1cyI6InJlYWR5In0.",
  "max_layers": 4
}

Parameters

ParameterTypeRequiredDescription
blobstringYesPublic blob value used to scope this lookup.
hintstringNoPublic hint value used to scope this lookup. One of: auto, brotli, hex.
max_layersintegerNoPublic max layers value used to scope this lookup.

Example response

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

{
  "capability": "blob.decode",
  "data": {
    "ambiguity_candidates": [],
    "decoded": false,
    "final_base64": "example",
    "final_bytes": 0,
    "final_json": null,
    "final_kind": "json",
    "final_text": "example",
    "layers": [],
    "scope": "caller_supplied_blob_decode_only",
    "stop_reason": "already_json",
    "truncated": false
  },
  "meta": {
    "cache": "miss",
    "checked_at": "2026-01-01T00:00:00.000Z",
    "duration_ms": 0,
    "provider": "node-buffer"
  },
  "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/blob/decode' \
  -H 'content-type: application/json' \
  --data-raw '{"blob":"eyJhbGciOiJub25lIiwidHlwIjoiSldUIn0.eyJqb2IiOiJidWlsZC00MiIsInN0YXR1cyI6InJlYWR5In0.","max_layers":4}'

# 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/blob/decode' \
  -H 'content-type: application/json' \
  --data-raw '{"blob":"eyJhbGciOiJub25lIiwidHlwIjoiSldUIn0.eyJqb2IiOiJidWlsZC00MiIsInN0YXR1cyI6InJlYWR5In0.","max_layers":4}' \
  | 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%2Fblob%2Fdecode&method=POST
const res = await pay("https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/blob/decode", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "blob": "eyJhbGciOiJub25lIiwidHlwIjoiSldUIn0.eyJqb2IiOiJidWlsZC00MiIsInN0YXR1cyI6InJlYWR5In0.",
    "max_layers": 4
  }),
});
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/blob/decode",
        json={
            "blob": "eyJhbGciOiJub25lIiwidHlwIjoiSldUIn0.eyJqb2IiOiJidWlsZC00MiIsInN0YXR1cyI6InJlYWR5In0.",
            "max_layers": 4,
        },
    )
    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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4 h agoPassed40239 ms$0.003
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