Coal - Payments for AI agents
Rank #107,110smithery/coal/coal-payments
# Coal Coal gives AI agents a real checkout. Discover merchants through the decentralized 0G Storage catalog, pay autonomously in USDC on Base via x402 (Coinbase) or OKX APP (v2 envelope), and download purchased products — all without a human in the loop. Receipts are anchored on 0G Chain, allowing any third party to independently verify payments without trusting Coal itself. The MCP server is fully multi-tenant: every user supplies their own wallet key through the `X-Coal-Agent-Key` header, meaning the server never stores long-lived private keys or custody secrets. Agents are gasless by default — Coal covers operator gas costs. --- ## MCP Tools (13) ### Discovery & Marketplace * `discover_merchants` Browse the marketplace as a Markdown product grid * `search_products` Search and filter by product name, price, or tags * `get_merchant_profile` Retrieve merchant metadata and payout addresses * `query_merchant_memory` Natural-language merchant Q&A powered by TEE-backed 0G Compute --- ### Payments & Checkout * `check_paywall` Check whether an address has already paid * `create_checkout` Create a Coal checkout session *(requires API key)* * `get_checkout_status` Retrieve checkout session state and payment status * `pay_merchant` Send USDC on Base using ERC-3009 gasless transfers --- ### Verification & Delivery * `verify_receipt` Verify the complete proof trail: 1. Base transaction 2. 0G Storage receipt 3. 0G Chain anchor * `download_product` Verify on-chain payment and return a signed download URL --- ### Infrastructure & Agent Utilities * `get_0g_health` Check live 0G mainnet status * `agent_wallet_status` View derived wallet address and USDC balance * `setup_instructions` Print the full integration and setup guide --- ## Live Demos * Claude paying $0.10 for an ebook end-to-end `https://agent.usecoal.xyz` * x402 paywall demo `https://oracle.usecoal.xyz/api/price/ETH` --- ## Stack * Dual-protocol support: * Coinbase x402 * OKX APP * Base USDC settlement * 0G Storage receipts * 0G Chain receipt anchoring * 0G Compute Sealed Inference for policy execution * ERC-3009 gasless payment flow ---
Coal - Payments for AI agents is a Model Context Protocol (MCP) server. It ranks #107,110 of 137,492 servers tracked on MCP Toplist. Coal - Payments for AI agents is listed on Smithery, and ships as a single rolling release with no explicit version metadata. It was first listed on May 7, 2026.
Ranks ahead of 30,382 of 137,492 servers on MCP Toplist.
Use Coal - Payments for AI agents
Hosted remote endpoint gated by authentication — connect via its URL and authenticate with the provider (OAuth flow or an API key/header, per its docs).
claude mcp add --transport http coal-payments https://server.smithery.ai/coal/coal-payments/mcpThis endpoint requires authentication — see the server’s docs for credentials.
[mcp_servers.coal-payments]
url = "https://server.smithery.ai/coal/coal-payments/mcp"Add to ~/.codex/config.toml. This endpoint requires authentication — see the server’s docs for credentials.
https://server.smithery.ai/coal/coal-payments/mcpSettings → Connectors → “Add custom connector”, then paste this URL. This endpoint requires authentication — see the server’s docs for credentials.
{
"mcpServers": {
"coal-payments": {
"url": "https://server.smithery.ai/coal/coal-payments/mcp"
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). This endpoint requires authentication — see the server’s docs for credentials.
{
"servers": {
"coal-payments": {
"type": "http",
"url": "https://server.smithery.ai/coal/coal-payments/mcp"
}
}
}Save as .vscode/mcp.json in your workspace. This endpoint requires authentication — see the server’s docs for credentials.
{
"mcpServers": {
"coal-payments": {
"serverUrl": "https://server.smithery.ai/coal/coal-payments/mcp"
}
}
}Add to ~/.codeium/windsurf/mcp_config.json. This endpoint requires authentication — see the server’s docs for credentials.
{
"mcpServers": {
"coal-payments": {
"url": "https://server.smithery.ai/coal/coal-payments/mcp"
}
}
}This endpoint requires authentication — see the server’s docs for credentials.
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Listed on 1 registry
Not versioned
This server is published through a registry that does not expose explicit version metadata, and no GitHub release tags were found on the linked repository. The listing tracks a single rolling release.
Frequently asked questions
- Is Coal - Payments for AI agents listed on the Official MCP Registry?
- Coal - Payments for AI agents is not on the Official MCP Registry. It is listed on Smithery.
- How many versions does Coal - Payments for AI agents have?
- Coal - Payments for AI agents ships as a single rolling release with no explicit version metadata.
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