Nylas

Nylas Connector credentials API

A Nylas connector credential is a special type of record that securely stores information (such as provider settings) that allows you to connect using an administrator account. Nylas securely stores, hashes, and encrypts the connector credential's sensitive data, and the contents vary depending on the authentication provider. Bulk authentication grants use connector credentials to connect or reconnect user accounts to your Nylas application. You can also use them to override a connector's settings to perform administrative tasks. For more information, see the [Bulk authentication grant documentation](/docs/v3/auth/bulk-auth-grants/). Both Google and Microsoft bulk authentication grants can use connector credentials. To override the default values in a provider's connector settings (for example, the `client_secret` and `client_id`), [create a grant using Bring Your Own Authentication](/docs/v3/auth/bring-your-own-authentication/) and provide the connector credential in your request payload, along with the values to override. ## Connector credential limitations Keep the following limitations in mind as you work with connector credentials: - A connector credential _must_ be connected to an existing Nylas connector. - Each connector credential must have a unique name. - When you make a [Create Credential request](/docs/reference/api/connector-credentials/create_credential/), Nylas checks if a connector credential with the same parameters exists. If one _does_ exist, Nylas uses that connector credential instead of creating one.

Documentation GitHub OpenAPI

Operations 5

POST /v3/connectors/{provider}/creds Create a credential #

GET /v3/connectors/{provider}/creds List credentials #

GET /v3/connectors/{provider}/creds/{id} Get credential #

PATCH /v3/connectors/{provider}/creds/{id} Update a connector credential #

DELETE /v3/connectors/{provider}/creds/{id} Delete credential #

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OpenAPI Specification

openapi: 3.2.0
info:
  title: Nylas Connector credentials API
  version: v3
  summary: The complete Nylas v3 API — Email, Calendar, Contacts, Notetaker, Scheduling, Administration, and Migration.
  description: The Nylas API is designed using the REST ideology to provide simple and predictable URIs to access and modify objects.
  contact:
    url: https://www.nylas.com/
  x-provenance:
    method: harvested
    first_party: true
    publisher: Nylas
    source: https://developer.nylas.com/_spec-files/nylas-api.yaml
    harvested: '2026-08-21'
    sha256: 7ff001d571e163b1ffe22178741b59f813d8208ec878157a839a33dc2c13fd35
    bytes: 1666223
    note: 'Published by Nylas as the unified contract for the Nylas v3 API and stored verbatim; API Evangelist added only this provenance block. Submitted by the provider in api-evangelist/nylas#1 and verified against the live URL before harvest: OpenAPI 3.1.0, 118 paths, 208 operations, 174 component schemas, 100% of operations carrying summary, description, tag and a unique operationId, x-code-samples on 208 of 208. This document REPLACES a 22-operation scaffold API Evangelist derived from reading the documentation, now quarantined under openapi/_scaffold/.'
  x-evidence:
  - url: https://developer.nylas.com/_spec-files/nylas-api.yaml
    what: the published unified contract, harvested verbatim 2026-08-21 (200, text/yaml, 1,666,223 bytes)
  - url: https://developer.nylas.com/.well-known/api-catalog
    what: RFC 9727 linkset advertising that URL as service-desc for api.us.nylas.com and api.eu.nylas.com (200, application/linkset+json)
servers:
- url: https://api.us.nylas.com
  description: U.S.
- url: https://api.eu.nylas.com
  description: E.U.
security:
- ACCESS_TOKEN: []
- NYLAS_API_KEY: []
tags:


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# Full source: https://raw.githubusercontent.com/api-evangelist/nylas/refs/heads/main/openapi/nylas-connector-credentials-api-openapi.yml