CheapestInference

List subscription pools

All active Unlimited pools: models served, per-block USDC price for 30 days, coarse availability. Blocks are 8h daily windows (UTC); reserving all blocks = 24/7. No auth required.

Get pool details

One pool in detail: models, per-block prices, availability, and what the subscription includes.

Get a USDC subscription quote

Quote for subscribing to a pool with USDC on Base: exact amount, payment address, and the claim message you must sign after paying. Crypto subscriptions are one-time 30 days (no auto-renewal).

Confirm a USDC payment and receive your API key

After sending the quoted USDC amount on Base, submit the transaction hash plus an EIP-191 signature of the claim message (from get_crypto_quote) made with the paying wallet. Verifies the payment on-chain and returns your API key. Idempotent: safe to retry with the same tx_hash.

Get a card checkout link

Card payments require a browser (3-D Secure). Returns the dashboard page for the pool where a human can complete checkout. Card subscriptions auto-renew monthly until cancelled.

Check a subscription key

Status of a pool subscription key: pool, reserved daily blocks, expiry, renewal semantics.

How to connect

OpenAI-compatible and Anthropic base URLs plus ready-to-paste client snippets. Works with or without a key (keyless: explains subscribe and x402 pay-per-request options).