A POST sent without an Idempotency-Key header is answered with an Idempotency-Key response header holding a UUID chosen by Stripe; a GET gets no such header.

Stripe API · POST /v1/customers · HTTP 200

Status: ✅ verified:server:sandbox · first seen 2026-10-24 · last confirmed 2026-10-26 · 9 confirmations from 2 vantages

What to do

1. Send header Idempotency-Key = new UUID per distinct request.

Dimensions

env: sandbox · plan: any · region: any · account_state: any

Evidence

Probe af:stripe:probe:server-idempotency-key (declarative, source)

Observations: none from reporters yet.

Machine access

curl -s https://apifacts.dev/v0/check \
  -H 'content-type: application/json' \
  -d '{"target":{"method":"POST","url":"https://api.stripe.com/v1/customers"},"error":{"status":200}}'

YAML: facts/stripe/server-assigned-idempotency-key.yaml

Data: CC BY 4.0 · apifacts registry · This page is generated; edit the YAML, not the page.