API Reference

The Fastly API is a RESTful API that provides access to all the features available through the Fastly web interface. The API is organized into collections of endpoints that allow manipulation of objects related to Fastly services and accounts.

IMPORTANT: The API requires TLS 1.2. Because of the PCI Security Standards Council mandate, TLS versions 1.0 and 1.1 are no longer supported.


Most (but not all) API endpoints require authentication with an appropriately scoped API token, which may be created via the API or in the Fastly web interface. Requirements for individual endpoints are shown on each endpoint page. To authenticate a request, generate an API token, and then include it in your request as a Fastly-Key HTTP header:


If you are using curl to make requests, you can append a header with -H 'Fastly-Key: YOUR_FASTLY_TOKEN'.

WARNING: If you created a Fastly account before May 15th, 2017, you may have used legacy "API keys" to authenticate API requests. This account-level credential was migrated to a personal API token with a global scope and access to all of your services. Because all tokens need to be owned by a user, this credential was assigned to a newly created, synthetic user with the name Global API Token. All endpoints that support the legacy keys also support API tokens.

Postman collection

You can use Postman to explore the Fastly API:

  1. Download the latest Fastly API Postman collection
  2. Import the collection into your Postman client


Client libraries are available in a number of languages. The following clients are built and maintained by Fastly:

In addition to the official clients, our awesome community has also created clients and integrations for other languages.

WARNING: Fastly makes no warranty on third-party software. We assume no responsibility for errors or omissions in the third-party software or documentation available. Using such software is done entirely at your own discretion and risk.

fastly-configureRubyGDSA utility to configure the Fastly CDN from version-controllable VCL and YAML files
fastly-promisesNode.jsPhilipp SchultePromise based Node.js client
fastly on npmNode.jsJeremiah from FitBitCallback-based Node.js client which is currently the fastly package on npm

Rate limiting

Authenticated requests are subject to a limit of 1,000 non-read requests per hour. Read requests, such as GET and HEAD requests, are not limited. If you go over the rate limit, you will receive a 429 Too Many Requests HTTP response.

Rate limit information is provided in response headers, as shown below. The Fastly-RateLimit-Remaining header provides the number of API requests remaining in the current rate limit window. The Fastly-RateLimit-Reset provides the time at which the current rate limit window resets, as a Unix timestamp.

Fastly-RateLimit-Remaining: 999
Fastly-RateLimit-Reset: 1452032384