buy (Celo)
Celo's marketplace and CLI/MCP tool that lets agents pay per request in USDC, USD₮ or USA₮ on Celo for 780+ priced compute, data, blockchain and browser services, with no accounts or API keys.
Tags
Description
Install npm install -g @celo/buy, create a wallet stored in the OS keychain (buy setup), fund it with stablecoins on Celo mainnet (gas is sponsored), and register the stdio MCP server with buy mcp install --client all. buy curl reads the HTTP 402 challenge, signs the payment locally and retries, refusing anything above --max-amount; buy quote shows the price without paying. Seven tools are registered by default; the tool that moves money directly is opt-in behind a budget or allowlist. Some services (e.g. larger Google Cloud VMs) require a Self zero-knowledge proof (age 18+, not OFAC-sanctioned). Launched 2026-10-13 by Celo Core Co.; beta. Services are priced per call (some, like SQD data, are free); the npm package is Apache-2.0.
Agent access
Related
- x402: Open standard for internet-native payments built on HTTP 402, letting APIs and agents pay per request across crypto and fiat networks.
- Machine Payments Protocol (MPP): Open standard for machine-to-machine payments over HTTP 402, co-developed by Tempo and Stripe; charge per API request, tool call or content.
- pay.sh: Single-binary CLI that transparently handles HTTP 402 (x402 and MPP) payments so agents can call paid APIs with no sign-up.
- x402 Bazaar: Public catalog of x402 payment-gated services discovered by the CDP Facilitator; search by intent, browse resources or look up by merchant address.
- Agent Vault: Virtual agent cards and stored logins for AI agents: the agent fills checkout and sign-in forms with mock tokens and real values are substituted out of its view.
Sources
- https://usebuy.ai
- https://usebuy.ai/docs
- https://registry.npmjs.org/@celo/buy
- https://blockchain.news/news/celo-core-co-launches-buy-marketplace-autonomous-agent-payments
Machine-readable
- JSON
- Markdown
- Source file on GitHub (edit via pull request)