Connect Coal — Payments for AI agents and your agent gets 13 tools, among them agent_wallet_status, check_paywall, create_checkout. It answers at https://mcp.usecoal.xyz/api/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 10 of 10 times since 5 September 2026; the last check, on 18 October 2026, succeeded.
Payment rails for AI agents. Pay merchants in USDC on Base. Dual-protocol: x402 + OKX APP.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
agent_wallet_status | Check the USDC balance for your agent wallet (or any address). If `X-Coal-Agent-Key` is set in your Claude config header, this auto-resolves your wallet's address. Otherwise pass `address` or `agentPrivateKey`. The server holds NO long-live Inputs: address, agentPrivateKey |
check_paywall | Check whether an address has paid for a specific x402 paywall. Returns pricing info if not paid, or content access status if paid. Inputs: paywallId, address |
create_checkout | Create a Coal checkout session to pay for a product or amount. Settles in USDC on Base (~2s). Returns a checkout URL. Needs a Coal API key — set once via Claude config header `X-Coal-Api-Key:YOUR_KEY`, or pass per-call as `coalApiKey`. Get Inputs: amount, productId, productName, description, coalApiKey |
discover_merchants | THE DEFAULT FIRST CALL whenever the user wants to buy, get, fetch, grab, order, purchase, shop for, find, or browse anything (digital goods, ebooks, APIs, prompts, datasets). Returns a Markdown product grid with images, prices, and merchant |
download_product | Retrieve / download / get the file for a digital product after the user paid for it. Use after `pay_merchant` succeeds for digital goods (PDFs, ebooks, cheatsheets, datasets). Pass the on-chain `txHash` from `pay_merchant` OR a Coal checkou Inputs: product, txHash, sessionId |
get_0g_health | Check the live status of all 5 0G components: Storage, Chain, Compute, KV, DA. |
get_checkout_status | Check the payment status of a checkout session: pending, verifying, confirmed, expired, failed. Inputs: sessionId |
get_merchant_profile | Get the full profile of a Coal merchant including products (with images), paywalls, supported networks/tokens, and 0G Storage proof. Returns rendered Markdown. Inputs: merchantId |
pay_merchant | Send USDC on Base to any merchant payout address (the `payoutAddress` field shown by discover_merchants — NOT the merchantId). Use this whenever the user has confirmed they want to buy, purchase, pay, or send money for something. Gasless fo Inputs: to, amount, agentPrivateKey, sessionId, reason |
query_merchant_memory | Ask a natural language question about a merchant's products, policies, or catalog. Powered by 0G Compute with Sealed Inference (TEE). Needs a Coal API key — set once via Claude config header `X-Coal-Api-Key:YOUR_KEY`, or pass per-call as `c Inputs: merchantId, question, coalApiKey |
search_products | Search products across all Coal merchants. Filter by name, max price, or tag. Returns a Markdown product grid with images. Use this when looking for something specific like "find a figurine under $1". Inputs: search, maxPrice, tag |
setup_instructions | Print step-by-step instructions for using Coal MCP from Claude / Cursor / any MCP client. Run this FIRST if you are unsure how to authenticate or which credentials to provide. |
verify_receipt | Verify a payment receipt and see its 3-step proof trail: (1) Base TX, (2) 0G Storage receipt, (3) 0G Chain anchor. Inputs: sessionId |
Every block below points at https://mcp.usecoal.xyz/api/mcp. Pick your client and copy.
claude mcp add --transport http coal-payments-for-ai-agents https://mcp.usecoal.xyz/api/mcp
{
"mcpServers": {
"coal-payments-for-ai-agents": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://mcp.usecoal.xyz/api/mcp"]
}
}
}{
"mcpServers": {
"coal-payments-for-ai-agents": {
"url": "https://mcp.usecoal.xyz/api/mcp"
}
}
}{
"servers": {
"coal-payments-for-ai-agents": {
"type": "http",
"url": "https://mcp.usecoal.xyz/api/mcp"
}
}
}{
"context_servers": {
"coal-payments-for-ai-agents": {
"url": "https://mcp.usecoal.xyz/api/mcp"
}
}
}{
"mcpServers": {
"coal-payments-for-ai-agents": {
"serverUrl": "https://mcp.usecoal.xyz/api/mcp"
}
}
}{
"mcpServers": {
"coal-payments-for-ai-agents": {
"url": "https://mcp.usecoal.xyz/api/mcp"
}
}
}name: Coal — Payments for AI agents
version: 0.0.1
schema: v1
mcpServers:
- name: Coal — Payments for AI agents
type: streamable-http
url: https://mcp.usecoal.xyz/api/mcp{
"mcpServers": {
"coal-payments-for-ai-agents": {
"httpUrl": "https://mcp.usecoal.xyz/api/mcp"
}
}
}{
"mcpServers": {
"coal-payments-for-ai-agents": {
"type": "http",
"url": "https://mcp.usecoal.xyz/api/mcp"
}
}
}{
"mcpServers": {
"coal-payments-for-ai-agents": {
"url": "https://mcp.usecoal.xyz/api/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fmcp.usecoal.xyz%2Fapi%2Fmcp&type=streamable_http&id=coal-payments-for-ai-agents&name=Coal%20%E2%80%94%20Payments%20for%20AI%20agents
It answered our last check on 18 October 2026 in 264 ms. Over 10 checks since 5 September 2026 it answered 10. Status here comes from Neuronto's own probes, not from the publisher.
13, as returned by the server's own tools/list on 31 August 2026: agent_wallet_status, check_paywall, create_checkout, discover_merchants, download_product, get_0g_health, get_checkout_status, get_merchant_profile, and 5 more.
It answered our last check on 18 October 2026 in 264 ms. Over 10 checks since 5 September 2026 it answered 10.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://mcp.usecoal.xyz/api/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: io.github.emmanuel39hanks. Endpoint host: mcp.usecoal.xyz. ARD identifier: urn:air:io.github.emmanuel39hanks:mcp:coal.
First indexed 31 August 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.