---
title: "Start saving a payment card [write]"
method: POST
path: "/billing/card-setup"
---

# Start saving a payment card \[write\]

`POST /billing/card-setup`

## Request

- Base URL: `https://api.agentsky.dev/v1`
- URL: `https://api.agentsky.dev/v1/billing/card-setup`
- Auth: none declared

Returns a hosted card form URL to open in a browser. Saving the card does not charge it; auto top-up can charge it when a later session starts below the configured threshold. No request body is required.

## Response `200`

OK

- object
  - `url` string, uri, required

## Other responses

- `default`: Error — { error: { code, message, request_id } }

## Changes

- **2026-11-02** `e5e8f0229a99`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/agentsky/apis/agentsky-developer-api/changes/billing/card-setup/post.md)

---

[API](https://skmtc.dev/agentsky/apis/agentsky-developer-api.md) - [All operations](https://skmtc.dev/agentsky/apis/agentsky-developer-api/llms.txt) - [OpenAPI document](https://skmtc.dev/agentsky/apis/agentsky-developer-api/revisions/0d435187cd55?raw)