---
title: "Agent Access challenge data"
method: GET
path: "/v1/agent-access/appendix/{appendixRef}"
tags: ["Agent Access"]
---

# Agent Access challenge data

`GET /v1/agent-access/appendix/{appendixRef}`

## Request

- Base URL: `https://api.anchorbrowser.io`
- URL: `https://api.anchorbrowser.io/v1/agent-access/appendix/{appendixRef}`
- Auth: none required

Supporting data for an active Agent Access challenge. Path comes from the challenge response.

## Path parameters

- `appendixRef` string, required

## Response `200`

Appendix payload.

- object
  - `appendix_ref` string, required
  - `inventory` string, required: Text payload for the active challenge. Parse with challenge.prompt to compute the final integer answer.
  - `next` AgentAccessNextStep
    - `method` 'GET' | 'POST', required: HTTP method for the next call in the Agent Access onboarding flow.
    - `path` string, required: Path on https://api.anchorbrowser.io for the next call. Prepend the method to execute it.
    - `description` string, required: Plain-language instruction for what to do on the next call and what you receive afterward.

## Other responses

- `404`: Appendix expired or unknown.
- `429`: Too many requests from this source.

## Changes

- **2026-10-16** `b3bfdb98c79e`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/anchorbrowser/apis/anchorbrowser-api/changes/v1/agent-access/appendix/:appendixRef/get.md)

---

[API](https://skmtc.dev/anchorbrowser/apis/anchorbrowser-api.md) - [All operations](https://skmtc.dev/anchorbrowser/apis/anchorbrowser-api/llms.txt) - [OpenAPI document](https://skmtc.dev/anchorbrowser/apis/anchorbrowser-api/revisions/9d755f22df0e?raw)