Linkup

Q: Does Linkup have an API?

Yes. APIs.io lists 8 APIs from Linkup, including Linkup Credits API, Linkup Fetch API and Linkup Research API, and 5 more.

Q: Is there an OpenAPI specification for the Linkup API?

Yes. APIs.io indexes 8 OpenAPI specifications for Linkup, each linked for download from this page.

Q: How do I authenticate with the Linkup API?

Linkup uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Linkup Authentication.

Q: How much does the Linkup API cost?

Linkup publishes its prices; its Fetch (Standard, Pro) plan is $0.001 - $0.006 per request as of 2026-10-07. APIs.io lists 4 pricing plans for Linkup, with each plan's price, limits and inclusions under Pricing on this page.

Q: Is the Linkup API ready for AI agents?

Linkup has a Kin Score of 38.4 out of 100 (thin) and an Agent Readiness score of 22.1 (agent-aware), scored by API Evangelist on 2026-11-13.

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.

Linkup publishes 8 API contracts indexed on the APIs.io network, including Credits API, Fetch API, Research API, and 5 more. Tagged areas include Artificial Intelligence, LLM, Web Search, Grounding, and RAG.

The Linkup catalog on APIs.io includes 1 Spectral governance ruleset.

Linkup’s developer surface includes pricing, authentication, documentation, engineering blog, and 10 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

38.4/100 thin ▬ flat Agent 22/100 agent aware Front door AI 6/6 dominant Heartbeat 75/100 slowing saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessPaid

1 published contract

Artificial Intelligence LLM Web Search Grounding RAG

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 38.4/100 · thin

Contract Quality 10.1 / 19

Developer Ergonomics 4.7 / 15

Access Clarity 6.7 / 15

Operational Transparency 2.3 / 10

Contract Governance 1.2 / 9

Discoverability 5.0 / 8

Regulatory Posture 1.5 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 22/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 0 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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<a href="https://apis.io/providers/linkup-so/"><img src="https://apis.io/badge/linkup-so/card.svg" alt="Linkup on APIs.io — Kin Score by API Evangelist"></a>

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →

10 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Developer Ergonomics scores 31.0 — up to +13.8 composite points Ask about this →
Contract Quality scores 53.6 — up to +11.6 composite points Ask about this →
Access Clarity scores 44.7 — up to +11.1 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/linkup-so/apis.yml: open an issue on github.com/api-evangelist/linkup-so to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 8

Individual APIs this provider publishes, each with its own machine-readable definition.

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.

Linkup Extract API

The Extract API from Linkup — 2 operation(s) for extract.

Linkup Responses API

The Responses API from Linkup — 1 operation(s) for responses.

Linkup Rewind API

The Rewind API from Linkup — 2 operation(s) for rewind.

Linkup Tasks API

The Tasks API from Linkup — 2 operation(s) for tasks.

Scroll for all 8

Open Collections 5

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Linkup Credits API

OPEN COLLECTION

Linkup Credits Fetch API

OPEN COLLECTION

Linkup Credits Research API

OPEN COLLECTION

Linkup Credits Search API

OPEN COLLECTION

Linkup API

OPEN COLLECTION

Linkup API pricing

Prices published by Linkup, read 2026-10-07 from www.linkup.so/pricing.

Plan	Price
Fetch (Standard, Pro)	$0.001 - $0.006 per request Includes: Latency <2s / Synchronous
Search (Fast, Standard, Deep)	$0.005 - $0.006 per request Includes: Latency 1-3s / Synchronous
Research	$0.25 - $2.50 per request Includes: Latency 1-10min / Asynchronous
Enterprise	Custom pricing models Includes: Private environment, ZDR / SOC 2 Type II / SLA, dedicated support

Plan details, limits and sources →

Rate limits

Search and Fetch rate limit: 10 queries per second per organization

Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

Linkup Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Linkup Rate Limits

1 limits

RATE LIMITS

Compliance 1

Attestations the provider states (SOC 2, ISO 27001 and others), quoted from its own trust page. APIs.io verifies none of them.

Linkup

2 quoted statements, read from Linkup's own page on 2026-11-09.

COMPLIANCE

FinOps 1

Cost, billing, and metering signals for API financial operations.

Linkup Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Linkup API Rules

58 rules · 51 error-severity 3 warn-severity 4 info-severity

SPECTRAL

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Linkup Authentication

http · 1 scheme

SECURITY

Linkup Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Linkup Trust Center

SOC 2

SECURITY

Agentic Access (API Evangelist recommendations) 1

Recommended x-agentic-access execution contracts for AI agents.

Linkup Agentic Access

14 operations · 6 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

TrustCenter

TrustCenter

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Attestations

Attestations

Source (apis.yml)

aid: linkup-so
url: https://raw.githubusercontent.com/api-evangelist/linkup-so/refs/heads/main/apis.yml
name: Linkup
kind: company
description: 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.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/linkup-so.png
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-03
x-docs-hosting: vercel
tags:
- Artificial Intelligence
- LLM
- Web Search
- Grounding
- RAG
tags_raw:
- AI
- LLM
- Web Search
- Grounding
- RAG
created: '2026-06-20'
modified: '2026-06-20'
specificationVersion: '0.23'
apis:
- aid: linkup-so:linkup-so-credits-api
  name: Linkup Credits API
  description: The Credits API from Linkup — 1 operation(s) for credits.
  humanURL: https://docs.linkup.so/pages/documentation/api-reference/endpoint/post-search
  baseURL: https://api.linkup.so/v1
  tags:
  - Credit
  tags_raw:
  - Credits
  properties:
  - type: OpenAPI
    url: openapi/linkup-so-credits-api-openapi.yml
  - type: Documentation
    url: https://docs.linkup.so/pages/documentation/get-started/introduction
  - type: APIReference
    url: https://docs.linkup.so/pages/documentation/api-reference/endpoint/post-search
  - type: APIReference
    url: https://docs.linkup.so/pages/documentation/api-reference/endpoint/post-fetch
  - type: APIReference
    url: https://docs.linkup.so/pages/documentation/api-reference/endpoint/get-balance
- aid: linkup-so:linkup-so-fetch-api
  name: Linkup Fetch API
  description: The Fetch API from Linkup — 1 operation(s) for fetch.
  humanURL: https://docs.linkup.so/pages/documentation/api-reference/endpoint/post-search
  baseURL: https://api.linkup.so/v1
  tags:
  - Fetch
  properties:
  - type: OpenAPI
    url: openapi/linkup-so-fetch-api-openapi.yml
  - type: Documentation
    url: https://docs.linkup.so/pages/documentation/get-started/introduction
  - type: APIReference
    url: https://docs.linkup.so/pages/documentation/api-reference/endpoint/post-search
  - type: APIReference
    url: https://docs.linkup.so/pages/documentation/api-reference/endpoint/post-fetch
  - type: APIReference
    url: https://docs.linkup.so/pages/documentation/api-reference/endpoint/get-balance
- aid: linkup-so:linkup-so-research-api
  name: Linkup Research API
  description: The Research API from Linkup — 2 operation(s) for research.
  humanURL: https://docs.linkup.so/pages/documentation/api-reference/endpoint/post-search
  baseURL: https://api.linkup.so/v1
  tags:
  - Research
  properties:
  - type: OpenAPI
    url: openapi/linkup-so-research-api-openapi.yml
  - type: Documentation
    url: https://docs.linkup.so/pages/documentation/get-started/introduction
  - type: APIReference
    url: https://docs.linkup.so/pages/documentation/api-reference/endpoint/post-search
  - type: APIReference
    url: https://docs.linkup.so/pages/documentation/api-reference/endpoint/post-fetch
  - type: APIReference
    url: https://docs.linkup.so/pages/documentation/api-reference/endpoint/get-balance
- aid: linkup-so:linkup-so-search-api
  name: Linkup Search API
  description: The Search API from Linkup — 1 operation(s) for search.
  humanURL: https://docs.linkup.so/pages/documentation/api-reference/endpoint/post-search
  baseURL: https://api.linkup.so/v1
  tags:
  - Search
  properties:
  - type: OpenAPI
    url: openapi/linkup-so-search-api-openapi.yml
  - type: Documentation
    url: https://docs.linkup.so/pages/documentation/get-started/introduction
  - type: APIReference
    url: https://docs.linkup.so/pages/documentation/api-reference/endpoint/post-search
  - type: APIReference
    url: https://docs.linkup.so/pages/documentation/api-reference/endpoint/post-fetch
  - type: APIReference
    url: https://docs.linkup.so/pages/documentation/api-reference/endpoint/get-balance
- aid: linkup-so:linkup-so-extract-api
  name: Linkup Extract API
  description: The Extract API from Linkup — 2 operation(s) for extract.
  humanURL: https://docs.linkup.so/pages/documentation/api-reference/endpoint/post-search
  baseURL: https://api.linkup.so
  tags:
  - Extract
  properties:
  - type: OpenAPI
    url: openapi/linkup-so-extract-api-openapi.yml
- aid: linkup-so:linkup-so-responses-api
  name: Linkup Responses API
  description: The Responses API from Linkup — 1 operation(s) for responses.
  humanURL: https://docs.linkup.so/pages/documentation/api-reference/endpoint/post-search
  baseURL: https://api.linkup.so
  tags:
  - Responses
  properties:
  - type: OpenAPI
    url: openapi/linkup-so-responses-api-openapi.yml
- aid: linkup-so:linkup-so-rewind-api
  name: Linkup Rewind API
  description: The Rewind API from Linkup — 2 operation(s) for rewind.
  humanURL: https://docs.linkup.so/pages/documentation/api-reference/endpoint/post-search
  baseURL: https://api.linkup.so
  tags:
  - Rewind
  properties:
  - type: OpenAPI
    url: openapi/linkup-so-rewind-api-openapi.yml
- aid: linkup-so:linkup-so-tasks-api
  name: Linkup Tasks API
  description: The Tasks API from Linkup — 2 operation(s) for tasks.
  humanURL: https://docs.linkup.so/pages/documentation/api-reference/endpoint/post-search
  baseURL: https://api.linkup.so
  tags:
  - Task
  tags_raw:
  - Tasks
  properties:
  - type: OpenAPI
    url: openapi/linkup-so-tasks-api-openapi.yml
common:
- type: Pricing
  url: https://www.linkup.so/pricing
- type: AgenticAccess
  url: agentic-access/linkup-so-agentic-access.yml
- type: TrustCenter
  url: security/linkup-so-trust-center.yml
- type: DomainSecurity
  url: security/linkup-so-domain-security.yml
- type: Authentication
  url: authentication/linkup-so-authentication.yml
- type: GitHubOrganization
  url: https://github.com/LinkupPlatform
- type: LinkedIn
  url: https://www.linkedin.com/company/linkup-platform
- type: Website
  url: https://www.linkup.so
- type: Documentation
  url: https://docs.linkup.so
- type: Plans
  url: plans/linkup-so-plans-pricing.yml
- type: RateLimits
  url: rate-limits/linkup-so-rate-limits.yml
- type: Blog
  url: https://www.linkup.so/blog
- type: FinOps
  url: finops/linkup-so-finops.yml
- type: Attestations
  url: compliance/linkup-so-compliance.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Linkup API — frequently asked questions

Does Linkup have an API?

Yes. APIs.io lists 8 APIs from Linkup, including Linkup Credits API, Linkup Fetch API and Linkup Research API, and 5 more.

Is there an OpenAPI specification for the Linkup API?

Yes. APIs.io indexes 8 OpenAPI specifications for Linkup, each linked for download from this page.

How do I authenticate with the Linkup API?

Linkup uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Linkup Authentication.

How much does the Linkup API cost?

Linkup publishes its prices; its Fetch (Standard, Pro) plan is $0.001 - $0.006 per request as of 2026-10-07. APIs.io lists 4 pricing plans for Linkup, with each plan's price, limits and inclusions under Pricing on this page.

Is the Linkup API ready for AI agents?

Linkup has a Kin Score of 38.4 out of 100 (thin) and an Agent Readiness score of 22.1 (agent-aware), scored by API Evangelist on 2026-11-13.

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