One key to every API
your agents need.
Nitrograph picks the best provider for every task, checks each answer and refunds failures automatically. You only pay for calls that work.
No credit card required Set up in minutes Failed calls are free
- Google Maps Geocoding99.2%
- Mapbox Geocoding98.7%
- OpenCage96.1%
- Answer checked
- Charged the quoted price
- Receipt saved
Illustrative example
Access the APIs your team already relies on, plus 24,000+ more.
Stop managing API vendors.
Start shipping agents.
One integration finds, pays for and checks every call, instead of an account, a key and an invoice for every provider.
Find the right API automatically
Your agent describes the task. Nitrograph returns the provider that performs best on real calls.
- Search every API by what it does
- Ranked on real results: success rate, speed, refunds
- Certified providers reviewed end to end
One key, one bill
One prepaid balance covers every provider. No accounts to open, contracts to sign or wallets to manage.
- Price shown before every call
- Top up by card, no subscription
- Statements export to CSV for finance
Only pay for answers that work
Every response is checked before you're charged. If a provider fails, your money comes back automatically.
- Failed calls refunded automatically
- A signed receipt for every call
- Rankings can't be bought
Stay in control of what your agents spend.
Give agents a budget, not the company card. Your limits apply to every call, and every purchase is on the record.
Spending limits
Set per-call, daily and monthly caps on every key. Agents can't go over.
Instant shut-off
Turn off any key or connected app in one click.
Proof of every purchase
Each charge comes with a signed receipt your finance team can verify.
Automatic refunds
If a provider errors or returns a bad answer, you're not charged.
Full activity history
See what every agent bought, when and for how much. Export to CSV anytime.
Secure access
Google, GitHub or email sign-in with two-factor authentication. Apps connect through an approval screen.
Up and running in three steps.
Create your free key
Sign up, set a spending limit and add credits. Your first certified call is on us.
Connect your agent
Works with Claude Code, Cursor, Codex, Windsurf and any MCP client, or call the HTTP API directly.
Pay only for what works
Successful calls are charged at the quoted price. Failed calls are refunded automatically.
See which APIs your agent would find.
Have an API? Sell it to AI agents.
List your API for free and keep 100% of your price. Agents find it, pay per call and get a receipt; buyers cover the platform fee.
How much does it cost?
Searching is free. Each paid call costs the provider's price plus a 20% platform fee, shown before the call runs. You're only charged when the answer checks out, and failed calls cost nothing. There's no subscription or minimum.
What happens if a call fails?
You're not charged. Every answer is checked before payment is taken, and failed or invalid calls are refunded automatically.
How do we stop agents from overspending?
Every key has its own per-call, daily and monthly limits. You can turn off a key, or any app connected to your account, in one click.
Which AI tools does it work with?
Claude Code, Claude Desktop, Cursor, Codex, Windsurf and any other MCP client. You can also use the nitrograph CLI or plain HTTP.
Is it secure?
Sign in with Google, GitHub or email, with optional two-factor authentication. Connected apps get their own limited key through an approval screen, never access to your account.
Do you offer volume pricing or invoicing?
For larger teams, talk to us about volume pricing, invoiced billing and help getting set up.
I run an API. Can I sell through Nitrograph?
Yes. Listing is free and you keep 100% of your price; buyers pay the platform fee. Certified APIs get a verified badge and can offer free trial calls to new buyers.
Give your agents the APIs they need, without the risk.
Get a free API key in minutes, or talk to us about rolling Nitrograph out across your team.
No credit card required Failed calls are free