Issue a member token

POSThttps://app.booksbyinstant.com/api/integrator/v1/customers/{id}/members/{memberId}/tokens

Not idempotent: each call issues a new token. The secret is in this answer only. A token whose answer was lost is never shown again and counts toward the 20 until it is revoked or expires: list the member's tokens and revoke what nobody holds.

issueMemberToken · This page as markdown

Example request

cURL

curl -X POST 'https://app.booksbyinstant.com/api/integrator/v1/customers/01900000-0000-7000-8000-000000000000/members/01900000-0000-7000-8000-000000000000/tokens' \
  -H "Authorization: Bearer $INTEGRATOR_CREDENTIAL" \
  -H "Content-Type: application/json" \
  -d '{
  "expiresAt": "2026-01-15T09:30:00.000Z"
}'

JavaScript

// Node 18 or later, in an ES module (.mjs), which allows the top-level await.
const res = await fetch("https://app.booksbyinstant.com/api/integrator/v1/customers/01900000-0000-7000-8000-000000000000/members/01900000-0000-7000-8000-000000000000/tokens", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.INTEGRATOR_CREDENTIAL}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "expiresAt": "2026-01-15T09:30:00.000Z"
  }),
});
const data = await res.json();

Python

import os
import requests

res = requests.post(
    "https://app.booksbyinstant.com/api/integrator/v1/customers/01900000-0000-7000-8000-000000000000/members/01900000-0000-7000-8000-000000000000/tokens",
    headers={
        "Authorization": f"Bearer {os.environ['INTEGRATOR_CREDENTIAL']}",
    },
    json={
        "expiresAt": "2026-01-15T09:30:00.000Z",
    },
)
data = res.json()

Authorization

Bearer token live_<100 hex>

Authorization: Bearer <secret>. A 401 answers WWW-Authenticate: Bearer realm="instant-integrator-api".

Path parameters

id string · uuid required

The customer's id.
memberId string · uuid required

The member's id.

Request body

At most 4096 bytes.

Body application/json, required

object

A JSON object, {} at least: a request without one is refused. A token is issued only to an active member, who has at most 20 active tokens.

no other fields

expiresAt string · date-time

When the token stops working: an ISO 8601 date and time with its offset, such as 2027-01-31T12:00:00Z, in the future. Without one the token works until it is revoked.

Example, built from the schema

{
  "expiresAt": "2026-01-15T09:30:00.000Z"
}

Responses

201

The token and its secret.

Body application/json

object

token object required

The token just issued.
- id string · uuid required
  
  The token's id.
- hint string required
  
  The secret's prefix, … and its last four hex characters, to tell tokens apart.
  
  matches ^[a-z]+_m_…[0-9a-f]{4}$
- createdAt string · date-time required
  
  When the token was issued. ISO 8601 in UTC with milliseconds, such as 2026-11-06T10:00:00.000Z.
- expiresAt string · date-time or null required
  
  When the token stops working, or null when it works until it is revoked. ISO 8601 in UTC with milliseconds, such as 2026-11-06T10:00:00.000Z.
secret string required

The member token, shown this once. Keep it on your servers, in a secret manager.

matches ^[a-z]+_m_[0-9a-f]{100}$

Example, built from the schema

{
  "token": {
    "id": "01900000-0000-7000-8000-000000000000",
    "hint": "string",
    "createdAt": "2026-01-15T09:30:00.000Z",
    "expiresAt": "2026-01-15T09:30:00.000Z"
  },
  "secret": "string"
}

400

The body is not one JSON object, or a field is invalid; error says which. Also when expiresAt is not in the future.

Body application/json

object Error

Every answer that is not a success.

error string required

Instant's sentence for people. A 4xx keeps the refusal's own sentence; a 5xx always says "Instant is temporarily unavailable. Please try again shortly."
code string required

Stable, and what a caller branches on: VALIDATION_ERROR (400), UNAUTHENTICATED (401), FORBIDDEN (403), NOT_FOUND (404), CONFLICT (409), LIMIT_EXCEEDED (413), UNSUPPORTED_MEDIA_TYPE (415), UNREADABLE_FILE (422), RATE_LIMITED (429) and UNAVAILABLE (5xx). More codes may be added; treat one you do not know by its status.
retryAfter integer

Seconds to wait before retrying, also sent as the Retry-After header. Present only when there is a wait, as on a 429.

at least 1
existingId string · uuid

On a 409 that names the object already there, such as a customer with that reference: its id.

Example, built from the schema

{
  "error": "string",
  "code": "VALIDATION_ERROR",
  "retryAfter": 1,
  "existingId": "01900000-0000-7000-8000-000000000000"
}

401

The credential is missing, malformed, unknown, revoked or rotated, or its integrator is disabled. All of these answer the same way.

Headers

WWW-Authenticate string

Bearer realm="instant-integrator-api"

Body application/json