# Linkup

**Canonical:** https://apis.io/providers/linkup-so/  
**Website:** https://www.linkup.so  
**APIs profiled:** 4

Linkup is a production-grade web search and answer API for AI agents and LLMs. Its /search endpoint grounds model responses in real-time web context, returning ranked results, sourced answers with citations, or structured output, plus /fetch for clean LLM-ready markdown, an async /research endpoint, and a credits balance endpoint - all authenticated with a Bearer API key.

## Kin Score — 39.5 / 100 (developing)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 39.5).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 53.7 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 34.2 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 47.4 |
| Access Clarity | 47.4 |

## Agent readiness — 19.8 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (4)

- **Linkup Credits API** — The Credits API from Linkup — 1 operation(s) for credits.
- **Linkup Fetch API** — The Fetch API from Linkup — 1 operation(s) for fetch.
- **Linkup Research API** — The Research API from Linkup — 2 operation(s) for research.
- **Linkup Search API** — The Search API from Linkup — 1 operation(s) for search.

## Agentic access (1)

- **Linkup So Agentic Access** — 5 operations · 3 acting

## Security (3)

- **Linkup So Authentication** — http · 1 scheme
- **Linkup So Domain Security** — TLSv1.3 · HSTS · DMARC
- **Linkup So Trust Center** — SOC 2

## Plans (1)

- **Linkup So Plans Pricing**

## Tags

Artificial Intelligence, LLM, Web Search, Grounding, RAG

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/linkup-so/). Scores are computed from the provider's own public artifacts under a published rubric.