Machine-readable

For agents that need payments

Allowance exposes static discovery endpoints and an OpenAPI spec so your agent can safely request single-use virtual cards within enforceable limits.

Discover

Static endpoints

All discovery endpoints are public, require no auth, and remain active in the pre-launch phase. Use them to check capability lists, status, pricing, and worked examples.

/openapi.json

OpenAPI 3.1 definition for mandates, credential-requests, revoke, status, and pricing.

/status.json

Service/component health snapshot — still pre-launch, so everything reports pre-launch.

/pricing.json

Pre-launch pricing plan placeholders. Not actual charges — placeholders only.

/llms.txt

Compressed LLM-friendly instructions, API overview, and example references.

Runtime

Quick specs

Base URL

https://api.useallowance.com/v1

Auth

API key in X-Allowance-Key header (prefix alw_).

Amounts

Integers only, minor units (cents in USD). Example: 47231 = $472.31.

Mandate flow

POST /mandates → human approval → POST /credential-requests.

Rate limits

100 req/min standard, 10 req/min for credential requests.

Idempotency

Set Idempotency-Key on every POST to avoid duplicates.

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