Spreadsheet software built for agents.

One API call makes a grid that lives at a URL. Your agent writes it, your cron job updates it, and you watch every edit land live in the browser. Signing up is optional.

curl -X POST https://sheets.fast/api/v1/workbooks -d '{"name":"my grid"}'
→ { "id": "wbk_a8Kx92mQ3Fpq", "url": "https://sheets.fast/wbk_a8Kx92mQ3Fpq" }

Read the docs

A11 call

Zero ceremony

POST once and the workbook exists, addressable at its URL. Claim it later if you want to keep it.

B19 tools · ~2,500 tokens

A surface agents can hold in their head

The whole MCP tool set fits in two screens of text. Comparable connectors weigh 13k to 17k tokens.

C143/43

Measured, not claimed

Three frontier models pass every task on our public evals, run against this exact infrastructure.

The numbers above are live claims. See the eval scoreboard.