Paste any JSON and get a live, public mock API endpoint in seconds — no signup, no install. Supports GET, POST, PUT, PATCH, DELETE, custom status codes, response headers, simulated latency, conditional responses, and open CORS.
What you get
A public HTTPS URL in seconds — Paste any JSON, click generate, and the endpoint is live immediately. No signup, no email, no install.
All HTTP methods — GET, POST, PUT, PATCH, and DELETE, configurable per endpoint.
Custom status codes and headers — Return any status from 100 to 599 and any response headers your client expects.
Simulated latency and errors — Add response delay up to 10 seconds, or make a percentage of requests fail, to test how your app handles slow and broken backends.
Conditional and round-robin responses — Return different payloads based on a query parameter or header, or cycle through payloads across successive requests.
Live request inspector — See body, headers, query params, IP, and timing for every request that hits your endpoint.
Open CORS — Callable directly from browser code, mobile apps, emulators, and CI with no proxy.
What developers use it for
Frontend development — Build UIs against real endpoints before the backend exists.
Testing — Point integration tests and Postman collections at a stable, known response.
Webhook testing — Inspect incoming payloads from GitHub, Stripe, Shopify, and others.
Load testing — Simulate a backend under load without touching production.
Frequently asked questions
Is MockBolt free?
Yes. Every mock endpoint is free for 7 days with no signup, no credit card, and no email required. Mocks that keep receiving traffic auto-renew automatically.
Which HTTP methods does MockBolt support?
MockBolt supports GET, POST, PUT, PATCH, and DELETE on every mock endpoint.
Can I set custom headers and status codes?
Yes. You can configure custom response headers, any HTTP status code from 100 to 599, and a simulated response delay up to 10 seconds.
Do I need an account to use MockBolt?
No account, no email, no credit card. Paste JSON and you get a public endpoint URL plus a private management URL — that is it.
How long does a free mock endpoint last?
Free mocks start with a 7-day window and auto-renew as long as they keep receiving traffic. Mocks with no hits for 7 days are deleted. Pay $2 once to make any endpoint permanent regardless of traffic.
Can I use MockBolt to test webhooks?
Yes. Point any webhook source such as Stripe, GitHub, Shopify, or Twilio at a MockBolt URL. You see the full incoming payload in the real-time inspector, and control exactly what response goes back.