Every entry answers to the community
The index is expansive; the community keeps it honest. Votes, reviews and verified corrections feed straight back into rankings and data confidence.
- Vote
Upvote routers that deliver, downvote the ones that don’t — the score re-ranks the index.
- Review
Evidence-based reviews with verification tags. Ratings, not vibes.
- Verify
Corrections that survive review flip the entry to verified — with the evidence on file.
Anyone can edit this index
Every router page has an edit button — propose corrections to descriptions, prices and free tiers. Editors review each proposal against primary sources before it goes live.
- Propose
Open a router page, hit the edit button, and detail your proposed corrections.
- Review
Editors rigorously verify every proposed correction against primary sources.
- Live
Accepted edits are published instantly and logged in the public journal.
Recomputed from the live AI provider directory on every request — counts shift as providers change tiers · last entry update: 29 Sept 2026.
Top free AI API keys in the directory
The eight largest free allowances tracked right now across AI API providers, ranked by normalized free-credit value — a data sort, never sponsored. Values are USD estimates derived from each provider's published signup bonuses, monthly quotas and usage allowances at pay-as-you-go rates; where a figure required an assumption it carries an est. marker.
| # | Provider | Category | Free credits | Access | Status |
|---|---|---|---|---|---|
| 1 | BluesMinds | Free relay | $500.00est | API key | up· 370 ms |
| 2 | Vertex AI | Paid API | $300.00 | API key | unknown |
| 3 | AWS Polly | Search / Audio API | $200.00 | Audio | unknown |
| 4 | AgentRouter | Free relay | $200.00 | API key | up· 1229 ms |
| 5 | Deepgram | Search / Audio API | $200.00 | Audio | unknown |
| 6 | Mistral AI | Official free tier | $200.00est | API key | down· 4322 ms |
| 7 | SenseNova | Official free tier | $200.00est | API key | up· 966 ms |
| 8 | LongCat | Free product | $150.00est | API key | up· 1197 ms |
Free tiers change without notice — confirm current API limits on the provider's official pricing page before you rely on them.
Free AI API key vs. paid AI API: which one do you need?
A free AI API key is the right starting point for prototypes, hobby projects, model evaluations and low-volume production — you test models and integration paths with $0 of your own spend. A paid API key buys headroom: higher rate limits, priority capacity, SLAs and first access to new models.
| Dimension | Free AI key | Paid AI key | Uprouter directory |
|---|---|---|---|
| Cost | $0 until the allowance runs out | Per-token or per-plan billing | $0 — the directory itself |
| Limits | Quotas, API rate limits, expiry | Vendor SLA & priority capacity | Shows each provider’s current limits |
| Models | Free subset of the catalog | Full catalog | The whole catalog, cross-searchable |
| Failure mode | 429 when the quota is dry | Downtime | Live probes flag dead endpoints |
| Best for | Prototypes, evals, low volume | Production at scale | Choosing which key to use |
The hybrid pattern works well in practice — and it's exactly what this index is for: compare a free allowance against the paid headroom for the same models, check the live status before you commit, and see the break-even point in writing. Every entry records both the free tier and the paid pricing, so the free-versus-paid decision is data, not guesswork.
Keep every free AI key working
The problem with five free AI keys is not the cost — it's the drift: allowances change, rate limits tighten, and endpoints go quiet without any notice. The index tracks all of it: every entry records the current free tier, its credit value, the paid fallback price, and a live status probe that runs on a schedule so a dead endpoint is flagged before it costs you an afternoon.
That is how a stack of free keys stays useful: you know which allowance expires next, which endpoint just started failing, and what the paid price looks like when you outgrow the free tier — on one screen, with no login required.
$ open /status
→ live uptime board, no account needed
# every endpoint probed on a schedule —
# up / degraded / down with the last-seen time,
# plus a per-entry board on each router page
// the basics
What is a free AI API key?
A free AI API key is a credential that lets your software call AI model APIs — chat, embeddings, images — without paying per token. Instead of a bill, the provider grants you a free allowance: signup credits, a daily or monthly quota, or a set of free models. Your code sends the key with each API request, and the provider meters your usage against that allowance.
Free access shows up in four shapes across the AI provider directory: official free tiers (provider-run, with real quotas), signup free credits (a one-time balance), free-only routers (the whole API surface is free), and no-auth endpoints (no key at all, rate-limited by IP). Every entry on UPROUTER.ONLINE is tagged with its access method, so you can tell a genuine free AI key from a time-boxed trial before you sign up.
The catch: free allowances are rate-limited, can expire, and change without notice. That's why each entry carries a verification date and a normalized USD value for what the free AI tier is actually worth — see the methodology for how credit values are derived.
// in five steps
How to get a free AI API key
Five steps from zero to a working free AI API key. The directory lists each provider's access method and verification date, so you can skip options that need a card before you even click through.
- 01
Pick a provider with a verified free tier.
Start with the biggest free credits list, then filter by access method: no auth, OAuth, or a plain API key. Every row links to the full entry, which shows the provider's official pricing source and the date the free tier was last verified.
- 02
Create the account.
Sign up on the provider's dashboard. Many official free tiers require no credit card — the entry's access category tells you before you click. If a free tier does require billing details, the provider's official pricing page will say so; confirm there before you rely on the allowance.
- 03
Copy the API key.
Generate or copy the key from your dashboard. Treat it like a password: it's the credential that meters your free usage, and anyone holding it can spend your free AI credits.
- 04
Test with one request.
Send a single minimal AI chat completion and confirm a
200 OKresponse with usage in the body. That proves the key works and shows you the exact metering you'll get from day one. - 05
Track it in the directory.
Find the provider's entry in the directory — free tier, credit value, risk rating and live status on one page. When a free tier changes, the entry gets corrected, and the verification date tells you how fresh the numbers are.
// faq
Free AI API key — frequently asked questions
What is a free AI API key?
A credential that lets software call AI model APIs against a free allowance — signup credits, a quota, or free models — instead of a per-token bill. Allowances are rate-limited and can change; each entry shows the access method and a verification date.
Is there a free AI API key that doesn't require a credit card?
Many official free tiers don't require a credit card; some require billing details even for the free allowance. Each entry records the access method — no auth, OAuth, or API key — and links to the provider's official pricing page for final confirmation.
Which providers offer the biggest free AI API credits?
The three largest tracked right now are BluesMinds, Vertex AI and AWS Polly, by normalized USD value of the free AI allowance. The full ranking of every quantified free tier is on the biggest-free-credits list.
Do free AI keys expire?
Allowances can be one-time signup credits or recurring quotas that refresh daily or monthly, and providers change tiers without notice. Every entry shows a verification date for freshness, and unquantifiable values are shown honestly as 'not quantified'.
What's the difference between a free AI API key and a free trial?
A trial is a time-boxed window into a paid product; a free key is an ongoing credential with a defined allowance — credits, a quota, or free models. Trials end on a date; free keys end when the allowance runs out or the tier changes.
Can I combine several free AI keys?
Yes — combine them in your own app: keep the keys separate, try them in cost order, and fall over to the next one when a request hits a 429 or a dry quota. The directory lists each provider’s free allowance and current status side by side, so building that failover ladder is a matter of choosing entries — and the risk rating tells you which keys to trust with production traffic.
Are free AI keys safe to use in production?
It depends on the provider. Each entry carries a community-evidenced risk rating (low / medium / high) with the reasoning: operator age, API terms clarity, data handling. Use low-risk providers for anything you depend on; treat high-risk relays as experimental.
Is the ranking on this page sponsored?
No. Every list is ordered by data — free AI credit value, price, risk rating or community score. There is no pay-to-rank: affiliate and referral links never influence data, scores or sorting.
from the blog
Notes on free AI keys, tokens and credits
Free Tiers That Changed in 2026: Six Verified Pricing Shifts
GitHub Models was retired, Perplexity's Sonar API sunsets September 27, Cerebras's starting credit is now $5, and OpenAI dated its promotional pricing. Here is what changed and what to do.
Free Tiers for AI Agents: Your Token Budget Is a Request Budget
An agent does not make requests the way a chat user does — one turn can be five round-trips, each re-sending the whole conversation. Free tiers that look generous on tokens are brutal on agents.
Daily vs Monthly vs One-Time: Free Tier Reset Shapes Compared
Free tiers reset on three different clocks — daily pools, monthly credits, and one-time grants that never refill. The clock, not the dollar value, decides which shape fits a workload, and the best answer is a portfolio.