UK tax, as an API.

No iXBRL. No babysitting the Government Gateway. One call: trial balance in, filed CT600 out. Stripe made payments boring — we're doing the same for UK Corporation Tax.

31 endpoints

Full lifecycle — import, classify, compute, validate, file

MCP-native

For Claude, GPT, and any tool-using agent framework

HMRC Approved

HMRC-recognised — real Government Gateway, not sandbox

Get API access 5-minute quickstart

# One call: trial balance in, filed return out.
curl https://api.robocount.ai/v1/returns/file \
  -H "Authorization: Bearer $ROBOCOUNT_KEY" \
  -d '{
    "period":   "2025-04-01..2026-03-31",
    "trial_balance": "tb_01HZX9…",
    "ai_classify": true
  }'

# → Filed with HMRC in 2m 14s
{
  "status": "filed",
  "tax_owed": 18472.50,
  "receipt": "rec_01HZX9…"
}