---
title: "Check RCS capability"
method: GET
path: "/v1/rcs/capabilities"
tags: ["RCS"]
---

# Check RCS capability

`GET /v1/rcs/capabilities`

Which recipients can receive RCS from the agent and which rich features their phones support. Up to 100 numbers.

## Query parameters

- `agentId` string, required
- `numbers` string, required

## Response `200`

One entry per number, in input order.

- object
  - `capabilities` RcsCapability[]
    - `phoneNumber` string
    - `rcsCapable` boolean
    - `features` string[] — e.g. RICHCARD_STANDALONE, RICHCARD_CAROUSEL, ACTION_OPEN_URL, ACTION_DIAL. Absent when not capable.

## Other responses

- `400` — Invalid request
- `401` — Missing or invalid API key. `code` is `missing_credentials` when no Authorization header was sent and `invalid_credentials` when the key is unknown, revoked or expired.
- `403` — Your plan does not include the inbox, which RCS requires.
- `404` — Agent not found
- `409` — The agent does not exist with the carriers yet

## Changes

- **2026-10-02** `d556591af3f6` — 8 info
  - added the optional property `code` to the response with the `401` status
  - added the optional property `details` to the response with the `401` status
  - added the optional property `docUrl` to the response with the `400` status
  - added the optional property `docUrl` to the response with the `401` status
  - …4 more
- **2026-09-30** `16a7b9d5373e` — 1 info
  - removed the `platform` enum value from the `details/budgetScope` response property for the response status `400`
- **2026-09-29** `698a0d89ab62` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/zernio/apis/zernio-api/changes/v1/rcs/capabilities/get.md)

---

[API](https://skmtc.dev/zernio/apis/zernio-api.md) · [All operations](https://skmtc.dev/zernio/apis/zernio-api/llms.txt) · [OpenAPI document](https://skmtc.dev/zernio/apis/zernio-api/revisions/f8dd1581bb14?raw)