MCP 服务器

CheapestInference

CheapestInference — unlimited flat-rate API for frontier open-source LLMs

README

CheapestInference MCP Server

Remote MCP server for CheapestInference — unlimited LLM inference at a flat monthly price. No token caps, no per-token billing: subscribe to a pool of frontier open-source models and use them through an OpenAI-compatible API (an Anthropic-compatible endpoint is included, so it works with Claude Code, Cursor, and any OpenAI SDK).

This MCP server is the commercial front door. From any MCP client — or from an autonomous agent — you can browse live pools and pricing, get a USDC quote, pay on Base L2, and receive an API key, end to end, without a browser and without a human in the loop.

https://api.cheapestinference.com/mcp

Transport: Streamable HTTP, stateless. No authentication to connect — management tools take your API key as a tool argument.

Note: inference itself is served over the OpenAI-compatible base URL (https://api.cheapestinference.com/v1), not over MCP. The get_connection_info tool hands you ready-to-paste client snippets.

Quick start

Claude Code

claude mcp add --transport http cheapestinference https://api.cheapestinference.com/mcp

Cursor / generic JSON config

{
  "mcpServers": {
    "cheapestinference": { "url": "https://api.cheapestinference.com/mcp" }
  }
}

Tools

Tool	Auth	What it does
`list_pools`	none	Active pools with per-block USDC prices (live) and availability
`get_pool`	none	One pool in detail: models, daily blocks, what the subscription includes
`get_crypto_quote`	none	Exact USDC amount, payment address on Base, and the claim message to sign
`confirm_crypto_subscription`	wallet signature	Verifies your payment on-chain and returns your API key
`get_card_checkout_link`	none	Dashboard URL to finish a card subscription in a browser
`get_subscription_status`	API key	Pool, reserved blocks, expiry, renewal semantics for your key
`get_connection_info`	optional API key	Base URLs + client snippets (OpenAI SDK, Claude Code, curl)

Subscribing with USDC, end to end

list_pools → pick a pool and one or more daily 8-hour blocks (all three = 24/7).
get_crypto_quote → exact USDC amount, the payTo address on Base, and a claim-message template.
Send the USDC (ERC-20) transfer from your wallet.
Sign the claim message (EIP-191, transaction hash filled in) with the same wallet that paid.
confirm_crypto_subscription with tx_hash, pool_slug, blocks, signature → your API key for the Unlimited pool.

USDC subscriptions are one-time 30-day purchases — renew by repeating the flow. Card subscriptions (via get_card_checkout_link) auto-renew until cancelled.

Agents with an x402-capable wallet (Coinbase AgentKit, x402-fetch) can also skip subscriptions entirely: keyless requests to the inference endpoint return a 402 with USDC pricing for pay-per-request.