---
title: "Mailbox-provider signals (Gmail Postmaster, SNDS, FBL)"
method: GET
path: "/domains/{id}/deliverability-signals"
tags: ["Domains"]
---

# Mailbox-provider signals (Gmail Postmaster, SNDS, FBL)

`GET /domains/{id}/deliverability-signals`

## Request

- Base URL: `https://api.poststack.dev`
- URL: `https://api.poststack.dev/domains/{id}/deliverability-signals`
- Auth: one of:
  - HTTP bearer
  - OAuth 2
    - Authorization code: `https://poststack.dev/oauth/authorize`
    - Token URL: `https://poststack.dev/oauth/token`
- TypeScript: <https://skmtc.dev/poststack/apis/poststack-api/docs/domains/:id/deliverability-signals/get.ts> (a function with typed inputs; its response is checked against the schema)

## Path parameters

- `id` string, required

## Response `200`

Signals.

- object
  - `domainId` integer
  - `signals` object[]
  - `gmailSpamRate` number, nullable
  - `outlookHealth` string, nullable
  - `fblComplaints30d` integer

## Other responses

- `400`: Validation failed — `error` names each offending field (`field: message`).
- `401`: Missing, malformed or unknown credentials (`WWW-Authenticate: Bearer …` is set).
- `403`: The credential lacks the `domains:read` scope (body `{ error: "insufficient_scope", required, missing }`), or the team is suspended.
- `404`: No such resource on this team.

## Changes

- **2026-09-30** `4dc1e20989c8`: 12 warning
  - added the new `daily_limit_exceeded` enum value to the `anyOf[#/components/schemas/Error]/code` response property for the response status `403`
  - added the new `daily_limit_exceeded` enum value to the `code` response property for the response status `400`
  - added the new `daily_limit_exceeded` enum value to the `code` response property for the response status `401`
  - added the new `daily_limit_exceeded` enum value to the `code` response property for the response status `404`
  - …8 more
- **2026-09-29** `ef5b22b98333`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/poststack/apis/poststack-api/changes/domains/:id/deliverability-signals/get.md)

---

[API](https://skmtc.dev/poststack/apis/poststack-api.md) - [All operations](https://skmtc.dev/poststack/apis/poststack-api/llms.txt) - [OpenAPI document](https://skmtc.dev/poststack/apis/poststack-api/revisions/0d3971e3a670?raw)