Zest · Authentication Profile

Zest Authentication

Authentication

Zest secures its APIs with http and oauth2 across 1 declared security scheme, as derived from its OpenAPI definitions.

CompanySPVPrivate MarketsFintechEquityInvestorsEscrowSPaaSMENA

Methods: http, oauth2 Schemes: 1 OAuth flows: API key in:

Security Schemes

HTTPBearer http

scheme: bearer

Source

Authentication Profile

generated: '2026-07-21'
method: searched
source: openapi/zest-openapi-original.json
docs: https://docs.zestequity.com/api-reference/authentication/exchange-a-jwt-assertion-for-an-access-token
summary:
  types:
  - http
  - oauth2
  http_schemes:
  - bearer
  oauth2_grants:
  - urn:ietf:params:oauth:grant-type:jwt-bearer
model: >-
  Partner-signed JWT-Bearer assertion grant (RFC 7523). The partner mints a
  short-lived JWT signed with an EdDSA private key registered with Zest, then
  exchanges it at POST /v1/oauth2/tokens for a short-lived bearer access token.
  The bearer token is sent in the Authorization header on every partner API
  call. HTTPBearer is the only OpenAPI-declared security scheme.
jwt_assertion_claims:
  iss: Partner API base URL
  sub: Partner client_id
  aud: https://sandbox-api.zestequity.com
  client_id: Partner client_id
  iat: now (unix seconds)
  exp: now + 60
signing_algorithm: EdDSA
token_endpoint: https://sandbox-api.zestequity.com/v1/oauth2/tokens
token_response:
  accessToken: bearer JWT
  refreshToken: JWT
  tokenType: Bearer
  expiresIn: 3600
  refreshExpiresIn: 2592000
schemes:
- name: HTTPBearer
  type: http
  scheme: bearer
  sources:
  - openapi/zest-openapi-original.json
provisioning: >-
  Sandbox client_id, the matching EdDSA private key, and a registered webhook
  URL + signing secret are provisioned during partner onboarding. Contact
  sara@zestholdco.com.

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