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unlob

Documentation

One base URL, one header, and a query surface an agent can discover for itself. Everything below is reachable on every plan, including the free one.

Get an API keyopenapi.json

Verified 5 August 2026·API surface

Base URL and authbash
export UNLOB_API_KEY="ulb_..."

curl -H "x-api-key: $UNLOB_API_KEY" \
  "https://api.unlob.com/search?q=climate+policy&collapse=story&limit=5"

Guides

Getting started

Querying

Operating

API reference

All endpoints →

Search & retrieval

Find passages, widen a result set, and fetch the one document you actually decided to read.

Coverage graph

Traverse the relationships the index already computed: corroboration, authority, entity briefs, connecting paths and packed context.

Discovery & operations

Capability discovery, coverage transparency, account state and the probes your infrastructure expects.

If your agent speaks the Model Context Protocol you do not need to write HTTP calls at all. All 11 tools are available over stdio JSON-RPC.

Machine-readable

We sell a search API, so this documentation is also available as structured data.

Get a key and start

One magic link creates your account and issues your first API key. 10,000 free requests a month, no card.