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In ChatGPT and Claude (web, desktop and phone), the Summer API works through the Summer MCP. Nothing to install.
1

Add the connector

Add this address as a custom connector:
Claude: add a custom connector and paste the address. ChatGPT: turn on developer mode, then add a custom connector (an app) with the address and OAuth sign-in. Step by step: Summer in ChatGPT and Claude.
2

Sign in once

The app opens the Summer sign-in page. Sign in with your Summer account, pick a spend limit for this app and choose Allow.
3

Ask for assets

Prompt
The app finds the Summer API operations with summer_search (models.list, models.estimate, models.run) and runs them with summer_call. The file is saved to your Summer library: open it in Summer Studio, or import it in Summer Engine by its asset id.
Use the full address above. The reviewed directory versions (/chatgpt, /directory) have a fixed tool list; see the versions for the app directories.

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What it costs

Every model has one public price: per model, image or clip, per second, or per 1,000 characters. It is the provider’s list price. No markup on assets. A failed job costs nothing. The defaults: Every other model and its price: models and pricing. Prices checked up to 2026-10-24.
  • Priced before it spends. The agent reads prices from summer api models and prices each job for free with summer api estimate (POST /v1/estimate). Ask it for the total before a big batch.
  • Paid from your Summer credits. Jobs use your paid credits: your plan’s credits and your top-ups. No plan is needed to start.
  • A limit per agent. You pick a spend limit when you choose Allow. Change it or revoke the agent any time in Settings > Connected apps. See sign-in and limits.

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Next

  • Models and pricing: every model with examples and its price.
  • Jobs: queued, running and done, batches and webhooks.
  • Errors: no_credits, over_limit and what to show the person.