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Obol — Metered Api Marketplace MCP Server

@superbigroach

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開発者ツール

トランスポート

stdio

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superbigroach

投稿者

Sb

Obol — Metered Api Marketplace MCP Server について

Pay-per-call API marketplace for AI agents. Discover and pay for metered services in USDC on Arc — no subscription, no account. Agents pay per call, sellers earn instantly.

#payments#usdc#blockchain#agents#marketplace

Obol — Metered Api Marketplace MCP Server の設定

以下の設定を使って、このサーバーを MCP 対応クライアントに追加してください。

{
  "mcpServers": {
    "obol": {
      "command": "npx",
      "args": [
        "-y",
        "@superbigroach/obol-mcp"
      ],
      "env": {
        "OBOL_AGENT_KEY": "<your-arc-wallet-private-key>"
      }
    }
  }
}

Obol — Metered Api Marketplace MCP Server のツール

5

Search the Obol directory for metered APIs an agent can pay for per call. Results are relevance-ranked (name > category > description). Returns id, price (USDC), description, the callable URL, and a relevance score.

Fund the agent's Gateway balance once (gas-free spending afterward). Amount in USDC, e.g. '5'.

Pay for and call an Obol metered service via Circle Gateway. Keyless by default: with OBOL_API_KEY set, Obol's relayer pays the seller on your behalf from your funded spending balance — no private key needed. Enforces your per-call maxPrice and your account's spending limits. Idempotent on retry. (Advanced: set OBOL_AGENT_KEY instead to self-custody and sign payments locally.)

List (publish) a new service on the Obol marketplace so other agents can discover and pay for it. Requires the seller's Obol API key (OBOL_API_KEY env). Obol auto-issues a real ACK-ID verifiable credential for the seller's wallet and returns the marketplace URL.

Get the agent wallet + Gateway USDC balances on Arc testnet.

概要

What is Obol — Metered Api Marketplace?

Obol is a marketplace that enables AI agents to discover, pay for, and call metered APIs using USDC on the Arc testnet. It is designed for developers building AI agents that need to consume APIs with on-chain, per-call payments.

How to use Obol — Metered Api Marketplace?

Obtain testnet USDC from faucet.circle.com, then integrate the Obol server into your AI agent platform (e.g., Claude or Cursor) by adding the server configuration. The server exposes tools such as find_service, pay_and_call, list_service, and get_balance.

Key features of Obol — Metered Api Marketplace

  • Search available APIs by keyword using find_service.
  • Pay in USDC and call any listed API instantly.
  • Publish your own API for other agents to buy.
  • Check your Arc wallet balance with get_balance.
  • No subscriptions or accounts, pay per call.
  • Sellers get paid instantly on-chain.

Use cases of Obol — Metered Api Marketplace

  • An AI agent searches for a weather API and pays per request.
  • A developer publishes their own API for other agents to license per-use.
  • An agent checks its available USDC balance before making a call.
  • An agent pays for and calls a data enrichment service on demand.

よくある質問

1

How do I obtain test USDC to use Obol?

You can get testnet USDC from faucet.circle.com.

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