One managed gateway · two sides
Managed API Gateway
Launch, sell, and consume APIs, all in one place.
OpenAPI-first · Gateway-enforced limits · Provider-owned Stripe payouts · Curated
# one key, one base URL, any subscribed API
$ curl -s https://eu-north-1.apimercado.com/v1/acme/fx-rates/latest/quote
-H 'X-API-Key: mk_live_…'
200 OK · 14ms
{ "base": "EUR", "rate": 1.0921, "asof": "2026-06-09" }
One marketplace. Two workflows.
Use APIs without vendor-dashboard sprawl.
Find the API you need, test it before integrating, subscribe to a plan, and call it through one managed gateway.
- ·One API key per subscription
- ·Gateway URL for consistent access
- ·Clear plans, quotas, and usage
- ·Runnable examples before integration
Sell your API without building the commercial layer.
Bring your OpenAPI spec. API Mercado handles hosted docs, subscriber keys, rate limits, usage tracking, plans, and billing.
- ·Import an OpenAPI spec
- ·Create free or paid plans
- ·Enforce quotas at the gateway
- ·Get paid through your connected Stripe account
For developers
Use an API in minutes.
- 1
Choose an API
Browse curated listings with use cases, pricing, documentation, uptime signals, and runnable examples.
- 2
Subscribe to a plan
Start with a free plan where available, upgrade when usage grows, and track quotas from one account.
- 3
Call through the gateway
Use a managed key and a stable gateway URL instead of juggling credentials across vendors.
For API owners
Turn your API into a product.
- 1
Connect your OpenAPI spec
Import endpoints, descriptions, parameters, examples, and authentication details from your spec.
- 2
Define plans and limits
Create free or paid plans, quotas, rate limits, and subscriber access rules.
- 3
Launch behind the gateway
API Mercado fronts your upstream API with managed keys, usage tracking, and gateway enforcement.
- 4
Collect payments
Subscribers pay through your connected Stripe account. The platform takes a flat 10% application fee and never holds your funds.
Featured APIs
Curated APIs with clear plans, docs, and gateway-protected access.
- Forex API★ 5.0 (1)FreeForex API★ 5.0 (1)Free
Mid-market prices and finalized daily closes & official daily fixings published by central banks.
Capital Enesti
<1k reqs/30d · ~22ms99.5% uptime
More APIs are being reviewed for the catalog.
What API Mercado handles
Built for APIs that need clear documentation, visible limits, controlled access, and reliable commercial infrastructure.
Subscriber keys
Issue, rotate, and revoke API keys per subscription.
Rate limits & quotas
Enforce plan limits at the gateway before traffic reaches the provider's upstream API.
Hosted OpenAPI docs
Turn API specs into browsable documentation with examples and request details.
Usage analytics
Track calls, errors, subscribers, and plan usage from one dashboard.
Plans & billing
Create free or paid plans and charge subscribers through a connected Stripe account.
Gateway routing
Expose a stable public endpoint while keeping upstream routing and provider infrastructure separate.
Start with the side you need today.
I want to use APIs.
Browse the catalog, test an API, subscribe to a plan, and connect through the gateway.
I want to sell my API.
Bring your OpenAPI spec and create a paid API product with docs, keys, plans, limits, analytics, and billing.
Closed beta. Listings are reviewed before publication.