---
title: "Retrieves the attestation signing keys in use by the attestation service"
method: GET
path: "/certs"
---

# Retrieves the attestation signing keys in use by the attestation service

`GET /certs`

Retrieves metadata signing certificates in use by the attestation service

## Query parameters

- `api-version` string, required

## Response `200`

The request has succeeded.

- JsonWebKeySet — JsonWebKeySet
  - `keys` JsonWebKey[] — The value of the "keys" parameter is an array of JWK values. By default, the order of the JWK values within the array does not imply an order of preference among them, although applications of JWK Sets can choose to assign a meaning to the order for their purposes, if desired.
    - `alg` string — The "alg" (algorithm) parameter identifies the algorithm intended for use with the key. The values used should either be registered in the IANA "JSON Web Signature and Encryption Algorithms" registry established by [JWA] or be a value that contains a Collision- Resistant Name.
    - `crv` string — The "crv" (curve) parameter identifies the curve type
    - `d` string — RSA private exponent or ECC private key
    - `dp` string — RSA Private Key Parameter
    - `dq` string — RSA Private Key Parameter
    - `e` string — RSA public exponent, in Base64
    - `k` string — Symmetric key
    - `kid` string — The "kid" (key ID) parameter is used to match a specific key. This is used, for instance, to choose among a set of keys within a JWK Set during key rollover. The structure of the "kid" value is unspecified. When "kid" values are used within a JWK Set, different keys within the JWK Set SHOULD use distinct "kid" values. (One example in which different keys might use the same "kid" value is if they have different "kty" (key type) values but are considered to be equivalent alternatives by the application using them.) The "kid" value is a case-sensitive string.
    - `kty` string, required — The "kty" (key type) parameter identifies the cryptographic algorithm family used with the key, such as "RSA" or "EC". "kty" values should either be registered in the IANA "JSON Web Key Types" registry established by [JWA] or be a value that contains a Collision- Resistant Name. The "kty" value is a case-sensitive string.
    - `n` string — RSA modulus, in Base64
    - `p` string — RSA secret prime
    - `q` string — RSA secret prime, with p < q
    - `qi` string — RSA Private Key Parameter
    - `use` string — Use ("public key use") identifies the intended use of the public key. The "use" parameter is employed to indicate whether a public key is used for encrypting data or verifying the signature on data. Values are commonly "sig" (signature) or "enc" (encryption).
    - `x` string — X coordinate for the Elliptic Curve point
    - `x5c` string[] — The "x5c" (X.509 certificate chain) parameter contains a chain of one or more PKIX certificates [RFC5280]. The certificate chain is represented as a JSON array of certificate value strings. Each string in the array is a base64-encoded (Section 4 of [RFC4648] -- not base64url-encoded) DER [ITU.X690.1994] PKIX certificate value. The PKIX certificate containing the key value MUST be the first certificate.
    - `y` string — Y coordinate for the Elliptic Curve point

## Other responses

- `default` — An unexpected error response.

## Changes

- **2026-07-13** (2018-09-01-preview) `74e240995f3e` — 1 breaking, 1 info
  - added the new required `query` request parameter `api-version`
  - api tag `OpenID Metadata Discovery` removed
- **2026-07-13** (2018-09-01-preview) `e2463a10f80d` — 3 info
  - api tag `Attestation Provider` added
  - api tag `OpenID Metadata Discovery` removed
  - added the non-success response with the status `400`
- **2026-07-13** (2018-09-01-preview) `cb7cc16888f7` — 3 info
  - api tag `OpenID Metadata Discovery` added
  - api tag `Attestation Provider` removed
  - removed the non-success response with the status `400`

[Change history](https://skmtc.dev/azure/apis/attestation-attestation/changes/certs/get.md)

---

[API](https://skmtc.dev/azure/apis/attestation-attestation.md) · [All operations](https://skmtc.dev/azure/apis/attestation-attestation/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/azure/attestation-attestation/revisions/74e240995f3e/schema)