Extract Graph

{
  "@type": "Dataset",
  "_tier": "perquery",
  "category": "extract-graph",
  "content_type": "extract-graph",
  "depth": 2,
  "edges": [
    {
      "relation": "integrates_with",
      "source": "claude-mcp-server",
      "target": "voidfeed-mcp"
    }
  ],
  "nodes": [
    {
      "capabilities": [
        "tool_use",
        "resources",
        "prompts"
      ],
      "id": "claude-mcp-server",
      "name": "Anthropic Claude MCP",
      "type": "mcp_server"
    },
    {
      "capabilities": [
        "resources"
      ],
      "id": "voidfeed-mcp",
      "name": "VoidFeed Data API",
      "type": "mcp_server"
    }
  ]
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://voidfeed.ai/v1/tools/extract/graph?depth=2'

# 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 - 'https://voidfeed.ai/v1/tools/extract/graph?depth=2' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// 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 $0.1 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.1" });
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 $0.1 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fvoidfeed.ai%2Fv1%2Ftools%2Fextract%2Fgraph
const res = await pay("https://voidfeed.ai/v1/tools/extract/graph?depth=2");
console.log(res.status, await res.text());

# 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 $0.1 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.1"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://voidfeed.ai/v1/tools/extract/graph?depth=2")
    print(res.status_code, res.text)