For the complete documentation index, see llms.txt.
pricing plans
Free to evaluate. Cheap to ship.
Start free with 1,000 credits/month — no card.
Upgrade when an endpoint becomes part of your product.
Cancel anytime from the Stripe portal — no sales call required.
Free
Free
1,000 credits/mo
1 req/sec
Hard cap
Testing and prototypes
Core text, hash, math, date, and conversion tools
Yearly billing: pay 10 months, get 12. Need >5M/mo, SOC 2, or a DPA? [email protected]
faq billing questions
Do I need a credit card to start?+
No. The Free plan needs only a verified email and includes 1,000 credits every month, forever.
What happens when a call fails?+
Failed calls (validation errors, 5xx) refund automatically — you're only billed credits for successful responses.
What happens when I hit my monthly cap?+
Free and Starter hard-cap: calls return a clear 429 until the 1st of the month (UTC). Pro and above can opt into metered overage at published per-1K rates — nothing is silently charged.
Can I cancel anytime?+
Yes, self-serve from the Stripe billing portal. Your plan stays active until the end of the paid period, then drops to Free — keys keep working.
How much does each endpoint cost per call?+
Most of the 720 endpoints cost 1 credit per successful call. Each tool's exact credit weight is published on its page and in the OpenAPI spec.
welcome
Every tool on miniwebtool.com, as a JSON API.
720 ready-made endpoints — calculators, converters, text, hashes, finance —
behind one key, one stable JSON envelope, and a fixed credit cost.
Built for apps, sites, and AI agents.
1Try it right here — every tool page has a playground with a prefilled test key. No signup.
2Get your own key by email — 1,000 free calls every month, no card required.
3Ship it — copy-paste snippets in 7 languages, or connect AI agents via MCP.