Paste a URL. APIGhost probes the endpoint, infers the response schema, detects authentication, and generates code snippets in your language — all in under 10 seconds.
Try it right now
The API exists. The docs don't. Maybe they never existed. Maybe the person who wrote them left. Maybe it's a third-party service with a 404 where the Swagger page should be.
So you do what you always do. Open the network tab. Fire off curl requests. Guess at which fields are required. Break things in staging before you figure it out. That's hours. For every undocumented endpoint you touch.
of developers report regularly working with APIs that have no documentation or outdated docs
— Stack Overflow Survey 2025
average time developers spend reverse-engineering an unfamiliar endpoint before moving on
— Survey of 300 developers, 2025
cost to you for the first 3 endpoints. Then $15/mo if you want the full picture.
Drop in any REST endpoint URL. Public or private. Internal or third-party. If you can reach it, APIGhost can document it.
APIGhost fires a safe, read-only request to the endpoint and analyzes everything: status codes, response headers, authentication schemes, rate limits, and the full response body.
In seconds you have an inferred response schema, a TypeScript interface, auth instructions, and copy-paste code snippets. Share the URL with your team. Export to OpenAPI.
APIGhost reads every field in the response body and infers the type, format, and optionality. Strings that look like UUIDs are typed as UUIDs. Nullable fields are flagged. Arrays are typed by their element structure.
Detects Bearer tokens, API keys (in headers or query params), HTTP Basic Auth, or no auth at all. Tells you the exact header name and format. No more scanning Stack Overflow.
Every analysis comes with JavaScript, Python, and cURL — with the real URL, detected auth headers, and content type filled in. Paid users get Go, Ruby, PHP, Java, C#, Rust, Swift, and Kotlin.
Every analysis gets a permanent, shareable URL. No account required to view. Add it to your Notion page. Link it in your PR description.
Enable monitoring on any endpoint. APIGhost checks it weekly. If the schema changes — a field disappears, a type shifts — you get an email with a precise diff before it becomes a production incident.
Every analysis can be exported as a valid OpenAPI 3.1 specification. Download individual endpoints or combine your entire catalog into one spec.
Start free. Upgrade when you need the full picture.
For occasional use and trying it out
For developers and teams who live with APIs
No commitment. Cancel anytime.
“I spent two hours trying to figure out the response shape of a legacy billing endpoint. Pasted it into APIGhost and had the TypeScript interface in eight seconds. It's embarrassingly useful.”
— Backend engineer, Series B startup
“We set up change detection on our top 12 third-party integrations. Last month it caught a breaking schema change in our payment gateway API 4 days before it would have hit production.”
— Platform engineer, fintech
“I'm a freelancer. Before I quote a project I need to understand what APIs I'm working with. APIGhost is the first thing I open when a client sends me an endpoint to evaluate.”
— Independent integration developer
No. If you're a paid user sending auth headers for private endpoint support, those headers are used only for the single probe request and are never written to our database. We store the header name (e.g., 'Authorization') but never the value.
APIGhost currently focuses on REST endpoints that return JSON. GraphQL introspection support is on our roadmap. For now, if you paste a GraphQL endpoint URL, we'll analyze the response you get.
APIGhost makes a best-effort GET request. If the endpoint returns a 401, 404, or other error, we'll document what we can — including the error schema, which is often just as useful. Paid users can add auth headers to get past 401s.
Yes, with the paid plan. If your internal API is accessible from the public internet (even behind auth), you can use private endpoint support to send your credentials. APIs on a private network or VPN are not reachable by our servers.
Raw JSON doesn't tell you which fields are optional, what the range of values is for an enum-like field, or what format a string follows (UUID vs email vs date-time). APIGhost infers all of this automatically.
We can't probe endpoints on private networks, localhost, or internal IP ranges (SSRF protection). We don't send POST requests — analysis is always read-only.