Linkup is the production-grade web search API for AI. Teams at Legora, Polymarket, Cohere, McKinsey, and SNCF ship production AI on Linkup because four things have to be true:Documentation Index
Fetch the complete documentation index at: https://docs.linkup.so/llms.txt
Use this file to discover all available pages before exploring further.
- Accuracy. Search ranks #1 among sub-second web search APIs on Verified SimpleQA with a 92% F-score. Research ranks #1 across the board on SealQA-0 with 61% accuracy. The evaluation harness is open source.
- Customization. The index adapts to your domain. Define which sources to trust, which domains to prefer, which proprietary data to blend in.
- Security. SOC 2 Type II, Zero Data Retention, GDPR, and Single Sign-On on every tier. Bring Your Own Cloud is available for the highest data sovereignty requirements: the full Linkup index runs inside your VPC and queries never leave your environment.
- Latency. Sub-second on standard search. Fast enough for voice AI, sales copilots, and live research tools.
Our endpoints
Linkup exposes four endpoints. Each has a distinct shape and is tuned for a different point on the latency/quality curve.| Endpoint | Shape | Latency | Mode | Use when |
|---|---|---|---|---|
| Search | Query → ranked URLs, sourced answer, or structured JSON | <1s–~30s | sync | Grounding an agent or LLM answer with retrieved web context |
| Fetch | URL → clean LLM-ready markdown | ~1s | sync | Extracting the full content of a known page |
| Research | Query → detailed report or precise answer with inline citations | 2–20 min | async | Multi-source synthesis, full reports, precise answers |
| Tasks | Batch of up to 100 Search/Fetch/Research calls → results for each | 1s–20 min | async | Bulk, scheduled, or background workloads |
Research is currently in beta. Behavior and parameters may change.
Where to next
Quickstart
Make your first call in five minutes.
For AI agents
Tool definitions and integration prompts for coding agents.
Playground
Test Linkup in the browser.
API reference
Full parameter spec for every endpoint.