Datacircle

Datacircle is a B2B data co-op API: customers send the original request of a supported data provider (currently the Up2Data and HarvestAPI LinkedIn profile APIs) to api.datacircle.dev with a Datacircle key at the provider's own price with no markup, and receive a daily flat file of pooled co-op data. It also ships a remote MCP server at api.datacircle.dev/mcp.

Datacircle publishes 4 API contracts indexed on the APIs.io network, including Datacircle API, Harvest API, Up2 Data API, and 1 more. Tagged areas include Company, B2B Data, Data Enrichment, LinkedIn, and Profiles.

The Datacircle catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Datacircle’s developer surface includes authentication, documentation, getting-started guide, engineering blog, pricing, support, API reference, and 24 more developer resources.

🌐 Visit website 📡 Source on GitHub
52.9/100 developing Agent 56/100 agent ready Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0
2 published contracts 1 MCP Servers
CompanyB2B DataData EnrichmentLinkedInProfilesMCPData Co-op

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0
Composite quality — 52.9/100 · developing
Contract Quality 13.9 / 21
Developer Ergonomics 8.1 / 17
Access Clarity 11.2 / 17
Operational Transparency 2.9 / 11
Contract Governance 2.2 / 10
Discoverability 5.5 / 9
Regulatory Posture 3.7 / 15
Agent readiness — 56/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 7 / 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 8 / 8
Dry-Run / Simulate Mode 0 / 4
Delegated User Identity 6 / 6
Protected Resource Metadata 5 / 5
Registration Without a Human 6 / 6
Agentic Commerce Well-Known Document 0 / 5
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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
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 github.com/api-evangelist/datacircle: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 4

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

Datacircle MCP Server

Remote Streamable HTTP MCP server exposing six tools that each wrap one Datacircle REST call; OAuth sign-in or API key.

Datacircle Datacircle API

Your Datacircle account: balance, adding funds, files, invites, API key.

Datacircle Harvest API

LinkedIn Profile API: HarvestAPI's own request, sent to api.datacircle.dev with your Datacircle key and `X-Data-Provider: harvestapi`.

Datacircle Up2 Data API

LinkedIn Profile API: Up2Data's own request, sent to api.datacircle.dev with your Datacircle key and `X-Data-Provider: up2data`.

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Datacircle MCP Server

Remote MCP server at api.datacircle.dev over streamable HTTP requiring OAuth; 6 tools listed.

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Datacircle Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Datacircle Rate Limits

1 limits

RATE LIMITS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Datacircle Context

10 classes · 102 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Datacircle API Rules

12 rules · 10 errors 1 warnings 1 info

SPECTRAL

JSON Schema 4

Standalone JSON Schema definitions for this provider's data models.

Balance

5 properties

JSON SCHEMA

File

8 properties

JSON SCHEMA

HarvestApiProfileResponse

11 properties

JSON SCHEMA

Up2DataEnrichResponse

3 properties

JSON SCHEMA

Security Posture 2

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

Datacircle Authentication

http · 1 scheme

SECURITY

Datacircle Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Datacircle Agentic Access

8 operations · 3 acting · 1 human-in-the-loop

8 operations · 3 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted
GettingStarted
 Login
Login

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 LLMsTxt
LLMsTxt
 MCPServer
MCPServer
 WellKnown
WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral
Spectral
 JSONLD
JSONLD
 Vocabulary
Vocabulary
 DataModel
DataModel
 ErrorCatalog
ErrorCatalog
 Conformance
Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk
ToolCrosswalk
 GitHubOrganization
GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication
Authentication
 DomainSecurity
DomainSecurity

Operate 2

Status, limits, changes, and where to get help

RateLimits
RateLimits
 Support
Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans
Plans
 Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 3

The organization behind the API

Website
Website
 Blog
Blog
 LinkedIn
LinkedIn

Other 4

Properties that don't map to a standard resource type

AgentCard
AgentCard
 Hosts
Hosts
 Vendors
Vendors
 X
X

Source (apis.yml)

apis.yml Raw ↑ 
aid: datacircle
name: Datacircle
image: https://datacircle.dev/og-co-op.jpg
description: 'Datacircle is a B2B data co-op API: customers send the original request of a supported data provider (currently
  the Up2Data and HarvestAPI LinkedIn profile APIs) to api.datacircle.dev with a Datacircle key at the provider''s own price
  with no markup, and receive a daily flat file of pooled co-op data. It also ships a remote MCP server at api.datacircle.dev/mcp.'
url: https://raw.githubusercontent.com/api-evangelist/datacircle/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-09 (local-v5; was harvest)
specificationVersion: '0.20'
created: '2026-10-09'
modified: '2026-10-09'
tags:
- Company
- B2B Data
- Data Enrichment
- LinkedIn
- Profiles
- MCP
- Data Co-op
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/datacircle-agentic-access.yml
- type: RateLimits
  url: rate-limits/datacircle-rate-limits.yml
- type: Plans
  url: plans/datacircle-plans-pricing.yml
- type: Spectral
  url: rules/datacircle-rules.yml
- type: JSONLD
  url: json-ld/datacircle-context.jsonld
- type: Vocabulary
  url: vocabulary/datacircle-vocabulary.yml
- type: DataModel
  url: data-model/datacircle-data-model.yml
- type: ErrorCatalog
  url: errors/datacircle-problem-types.yml
- type: Conformance
  url: conformance/datacircle-conformance.yml
- type: LLMsTxt
  url: llms/datacircle-llms.txt
- type: AgentCard
  url: a2a/datacircle-a2a.yml
- type: ToolCrosswalk
  url: mcp/datacircle-tool-crosswalk.yml
- type: MCPServer
  url: mcp/datacircle-mcp.yml
- type: WellKnown
  url: well-known/datacircle-well-known.yml
- type: Hosts
  url: hosts/datacircle-hosts.yml
- type: Vendors
  url: vendors/datacircle-vendors.yml
- type: Authentication
  url: authentication/datacircle-authentication.yml
- type: DomainSecurity
  url: security/datacircle-domain-security.yml
- type: Website
  url: https://datacircle.dev
- type: Documentation
  url: https://docs.datacircle.dev/
- type: GettingStarted
  url: https://docs.datacircle.dev/quickstart
- type: Blog
  url: https://datacircle.dev/blog
- type: GitHubOrganization
  url: https://github.com/waynehamadi/datacircle
- type: Login
  url: https://datacircle.dev/login
- type: Pricing
  url: https://datacircle.dev/pricing
- type: TermsOfService
  url: https://datacircle.dev/terms
- type: LinkedIn
  url: https://www.linkedin.com/company/datacircle-org
- type: X
  url: https://x.com/datacircle_dev
- type: PrivacyPolicy
  url: https://datacircle.dev/privacy
- type: Support
  url: https://datacircle.dev/support
- type: APIReference
  url: https://docs.datacircle.dev/api-reference/datacircle/reset-your-api-key
apis:
- aid: datacircle:datacircle-mcp
  name: Datacircle MCP Server
  description: Remote Streamable HTTP MCP server exposing six tools that each wrap one Datacircle REST call; OAuth sign-in
    or API key.
  humanURL: https://docs.datacircle.dev/mcp-server
  baseURL: https://api.datacircle.dev/mcp
  tags:
  - MCP
  properties:
  - type: Documentation
    url: https://docs.datacircle.dev/mcp-server
- aid: datacircle:datacircle-datacircle-api
  name: Datacircle Datacircle API
  description: 'Your Datacircle account: balance, adding funds, files, invites, API key.'
  humanURL: https://docs.datacircle.dev
  baseURL: https://api.datacircle.dev
  tags:
  - Datacircle
  properties:
  - type: OpenAPI
    url: openapi/datacircle-datacircle-api-openapi.yml
  - type: Documentation
    url: https://docs.datacircle.dev/
  - type: JSONSchema
    url: json-schema/datacircle-harvest-api-profile-response-schema.json
  - type: JSONSchema
    url: json-schema/datacircle-file-schema.json
  - type: JSONSchema
    url: json-schema/datacircle-balance-schema.json
  - type: JSONSchema
    url: json-schema/datacircle-up2-data-enrich-response-schema.json
- aid: datacircle:datacircle-harvestapi-api
  name: Datacircle Harvest API
  description: 'LinkedIn Profile API: HarvestAPI''s own request, sent to api.datacircle.dev with your Datacircle key and `X-Data-Provider:
    harvestapi`.'
  humanURL: https://docs.datacircle.dev
  baseURL: https://api.datacircle.dev
  tags:
  - HarvestAPI
  properties:
  - type: OpenAPI
    url: openapi/datacircle-harvestapi-api-openapi.yml
  - type: Documentation
    url: https://docs.datacircle.dev/
  - type: JSONSchema
    url: json-schema/datacircle-harvest-api-profile-response-schema.json
  - type: JSONSchema
    url: json-schema/datacircle-file-schema.json
  - type: JSONSchema
    url: json-schema/datacircle-balance-schema.json
  - type: JSONSchema
    url: json-schema/datacircle-up2-data-enrich-response-schema.json
- aid: datacircle:datacircle-up2data-api
  name: Datacircle Up2 Data API
  description: 'LinkedIn Profile API: Up2Data''s own request, sent to api.datacircle.dev with your Datacircle key and `X-Data-Provider:
    up2data`.'
  humanURL: https://docs.datacircle.dev
  baseURL: https://api.datacircle.dev
  tags:
  - Up2Data
  properties:
  - type: OpenAPI
    url: openapi/datacircle-up2data-api-openapi.yml
  - type: Documentation
    url: https://docs.datacircle.dev/
  - type: JSONSchema
    url: json-schema/datacircle-harvest-api-profile-response-schema.json
  - type: JSONSchema
    url: json-schema/datacircle-file-schema.json
  - type: JSONSchema
    url: json-schema/datacircle-balance-schema.json
  - type: JSONSchema
    url: json-schema/datacircle-up2-data-enrich-response-schema.json
x-submission-notes: 'B2B data co-op proxying LinkedIn profile APIs (Up2Data, HarvestAPI) | Kin approved listing 2026-10-09
  (case-by-case: Real API, but it resells LinkedIn-scraped profile data from third parties and pools customers'' data)'
x-submission-probe: docs OpenAPI 3.1 8 ops; invented path 404
x-submitted-by: wayne@datacircle.dev (email, 2026-10-09)
x-enrichment:
  date: '2026-10-09'
  status: enriched
  artifacts_added: 20
  pass: local-v5

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