Nanotoll is a per-call context compression service for LLM agents. You send text to POST /v1/compress, choose a squeeze mode, and get back compressed output plus a signed receipt that discloses exactly what the transform did.

Everything on this site describes the shipped surface only: the three squeeze modes (deterministic, extractive, verified), the receipt contract, and the account surface you need to register, fund, and monitor your calls.

Start here:

• Getting started - register, fund, first call, read the receipt. The only page a new customer needs.
• Concepts - the mode ladder, determinism, and the receipt contract.
• API reference - request and response shapes, account endpoints, errors, and the signing key distribution.
• Receipts - field-by-field semantics, end-to-end verification, pipeline stages, measured latency.
• Guides - worked use cases with honest limits.