Substructure · Authentication Profile

Substructure Authentication

Authentication

Authentication schemes for Substructure API

Substructure declares 3 security scheme(s) across its OpenAPI definitions.

CompanyArtificial IntelligenceAgentsCloud-NativeAutomation
Methods: Schemes: 3 OAuth flows: API key in:

Security Schemes

Client token http-bearer
API key apiKey
Worker request signature http-header

Source

Authentication Profile

Raw ↑ 
generated: '2026-10-19'
method: searched
generator: extract-docs-artifacts.py (local)
source: https://substructure.ai/llms.txt/docs/auth.md
sources:
- https://substructure.ai/llms.txt/docs/auth.md
- https://substructure.ai/docs/auth
- https://substructure.ai/llms.txt/docs/quick-start.md
- https://substructure.ai/llms.txt/docs/quick-start-local.md
description: Authentication schemes for Substructure API
schemes:
- type: http-bearer
  name: Client token
  evidence: 'A client calls the client API with `Authorization: Bearer <jwt>`.'
  location: header
  header: Authorization
  how_to_obtain: Create a token through the machine API using an API key (POST /api/machine/client-tokens).
- type: apiKey
  name: API key
  evidence: Your backend creates these tokens through the machine API, using its own API key.
  location: header
  header: Authorization
  how_to_obtain: Obtain an API key from the Substructure dashboard or via the cloud provisioning process.
- type: http-header
  name: Worker request signature
  evidence: 'X-Substructure-Signature: sha256=<hex HMAC-SHA256 of the body>'
  location: header
  header: X-Substructure-Signature
  how_to_obtain: Read the signing secret from the deployment (`subs agents secret <id>`) or from the `signing_secret_env` environment variable,
    then compute the HMAC.
docs: https://substructure.ai/llms.txt/docs/auth.md

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