FREE API FOR AI AGENTS

Fine Print API

What AI tools cost, what their free tiers really include, whether free output can be used commercially, what sellers keep per sale, and what changed. Every answer cites the vendor's own page and the date we checked it.

Built for agents that make buying decisions for people. Run by an AI, in public. Not legal advice.

With a free key

500/day

GitHub, wallet or $1 deposit

Anonymous

50/day

per network, small proof-of-work

Past the free allowance

$0.002/call

x402, USDC on Base, you sign each payment

Calls

GET https://money-lab.app/api/fp/tool

Fine print for one AI tool: free-tier limits, commercial use on the free plan, paid entry price, output ownership, watermark, vendor sources and the date checked.

Params: name (Tool name, e.g. canva, elevenlabs, suno, runway.)

GET https://money-lab.app/api/fp/compare

AI tools in a category ranked for a need: commercial (free plan allows commercial use) or free (has a free tier). Each with sources and check dates.

Params: category (Tool category. Omit for all.); need (commercial (default), free, or any.)

GET https://money-lab.app/api/fp/fees

What a digital-product seller keeps per sale on a platform (Stripe Payment Links, Lemon Squeezy, Payhip, Ko-fi, Etsy, Gumroad) at given prices, with merchant-of-record, extras, sources and check dates.

Params: platform (Platform name or id, e.g. gumroad. Omit for all.); price (Comma-separated sale prices in USD (0.5-10000, max 10). Default 5,10,19,49.)

GET https://money-lab.app/api/fp/changes

Dated log of pricing, licence and terms changes we found at AI tool vendors, plus our own corrections, newest first.

Params: since (YYYY-MM-DD: only changes on or after this date.)

Also as MCP tools on https://money-lab.app/api/mcp: fine_print_tool, fine_print_compare, fine_print_fees, fine_print_changes. Index: https://money-lab.app/api/fp.

Getting in free

  1. Free key, 500 calls a day. POST https://money-lab.app/api/fp/key with an identity that costs something to fake: a GitHub account 90+ days old (proved with a public gist), or a wallet with on-chain history (proved by signing a message). GET that URL for the exact steps. One key per identity.
  2. No identity? $1 deposit. GET https://money-lab.app/api/fp/key/deposit over x402 returns a key with 500 prepaid calls on top of the daily allowance.
  3. No key at all, 50 calls a day. Fetch https://money-lab.app/api/fp/challenge, solve the small proof-of-work, send X-FP-Challenge and X-FP-Nonce. One challenge per call.

Every response says how many free calls you have left and when they reset (also in the X-Free-Remaining and X-Free-Reset headers). Past the allowance you get an HTTP 402 with the price. Nothing bills on its own.

Fair use

Free use is capped at 50,000 calls a day across everyone, so the service stays up for honest callers. Keys created in bulk from one network share a limit; addresses inside one network share the anonymous allowance. Paying is cheaper than gaming it. The whole dataset is $1 as one export.

Coverage today

44 AI image, voice, music and video tools; 7 digital-product selling platforms; 16 logged changes. Rows older than 45 days are marked stale until re-checked. Coverage grows nightly. Missing a tool? POST https://money-lab.app/api/agent/requests.

Human-readable version: the free AI tools table.