Candid

Candid (formed from the 2019 merger of Foundation Center and GuideStar) helps social sector organizations advance their missions by sharing information, breaking down barriers, and improving giving. Candid maintains the most comprehensive set of data on U.S. nonprofits, foundations, grants, and philanthropy, and exposes that data through a family of developer APIs — Essentials, Premier, Charity Check, Demographics, Grants, News, Taxonomy, Eligibility, and PDF/Bulk variants — available through the Candid Developer Portal.

Candid publishes 2 APIs on the APIs.io network: Lookup API and Search API. Tagged areas include Charities, Donations, Non-Profit, Philanthropy, and Foundations.

Candid’s developer surface includes authentication, support, and 12 more developer resources.

🌐 Visit website 📡 Source on GitHub

33.3/100 thin ▬ flat Agent 20/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumSelf serve⚡ Free to try

9 APIs

Charities Donations Non-Profit Philanthropy Foundations Grants990sDemographics

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 33.3/100 · thin

Contract Quality 12.6 / 23

Developer Ergonomics 4.7 / 18

Access Clarity 4.7 / 18

Operational Transparency 1.2 / 12

Contract Governance 0.0 / 11

Discoverability 7.3 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 20/100 · 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

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.

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/candid: 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 9

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

Candid Premier API

Deep nonprofit profile data. Returns comprehensive records for a given organization including financials, programs, leadership, board, grants received and awarded, operating det...

Candid Charity Check API

Real-time nonprofit verification and compliance screening used for due diligence, donation compliance, and tax-deductibility checks. Returns IRS 501(c)(3) status, revocation his...

Candid Demographics API

Structured demographic data voluntarily provided by nonprofits about their staff, board, and populations served. Enables funders and platforms to analyze equity, diversity, and ...

Candid Grants API

Access to Candid's global grants dataset — summary statistics, funders, recipients, and individual transaction records. Useful for philanthropic benchmarking, funder research, a...

Candid News API

Search and retrieve philanthropic news content from Candid's curated news database covering funders, grantees, sector trends, and policy. Supports customizable parameters for da...

Candid Taxonomy API

Returns Candid's philanthropic classification system (subject, population, support-strategy, and geographic area taxonomies) so integrators can consistently tag and query nonpro...

Candid Nonprofit Eligibility API

Evaluates whether a given nonprofit is eligible to receive a grant or donation based on configurable rules — IRS status, country, OFAC, custom program criteria — to automate gra...

Candid Lookup API

Operations for retrieving lookup values and filter metadata.

Candid Search API

Operations for searching the Candid nonprofit database.

Scroll for all 9

Open Collections 4

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

API Collection

OPEN COLLECTION

Candid Essentials API

OPEN COLLECTION

Candid Essentials Lookup API

OPEN COLLECTION

Candid Essentials Lookup Search API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Candid Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Candid Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Candid Finops

FINOPS

Security Posture 2

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

Candid Authentication

apiKey · 1 scheme

SECURITY

Candid Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Candid Agentic Access

7 operations · 4 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

DataPortal

DataPortal

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

PricingAndAccess

PricingAndAccess

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 2

The organization behind the API

LinkedIn

Website

Website

Other 1

Properties that don't map to a standard resource type

APIsOverview

APIsOverview

Source (apis.yml)

aid: candid
name: Candid
url: https://raw.githubusercontent.com/api-evangelist/candid/refs/heads/main/apis.yml
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: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/candid.png
type: Index
tags:
- Charities
- Donations
- Non-Profit
- Philanthropy
- Foundations
- Grants
- 990s
- Demographics
tags_raw:
- Charities
- Donations
- Non-Profits
- Philanthropy
- Foundations
- Grants
- 990s
- Demographics
access: 3rd-Party
created: '2025-03-01'
modified: '2026-05-19'
position: Producing
specificationVersion: '0.23'
description: Candid (formed from the 2019 merger of Foundation Center and GuideStar) helps social sector organizations advance
  their missions by sharing information, breaking down barriers, and improving giving. Candid maintains the most comprehensive
  set of data on U.S. nonprofits, foundations, grants, and philanthropy, and exposes that data through a family of developer
  APIs — Essentials, Premier, Charity Check, Demographics, Grants, News, Taxonomy, Eligibility, and PDF/Bulk variants — available
  through the Candid Developer Portal.
apis:
- aid: candid:premier-api
  name: Candid Premier API
  description: Deep nonprofit profile data. Returns comprehensive records for a given organization including financials, programs,
    leadership, board, grants received and awarded, operating details, affiliations, and FTA (Financial Trend Analysis). Supports
    a Profile PDF generation endpoint for building ready-to-share nonprofit briefs.
  humanURL: https://developer.candid.org/reference/welcome
  baseURL: https://api.candid.org/premier
  tags:
  - Non-Profit
  - Financials
  - Profiles
  - PDF
  tags_raw:
  - Nonprofits
  - Financials
  - Profiles
  - PDF
  properties:
  - type: Documentation
    url: https://developer.candid.org/reference/welcome
  - type: Portal
    url: https://developer.candid.org/
- aid: candid:charity-check-api
  name: Candid Charity Check API
  description: Real-time nonprofit verification and compliance screening used for due diligence, donation compliance, and
    tax-deductibility checks. Returns IRS 501(c)(3) status, revocation history, public-charity / private- foundation classification,
    OFAC watchlist screening, and more. Offers national and state-level endpoints.
  humanURL: https://developer.candid.org/reference/welcome
  baseURL: https://api.candid.org/charitycheck
  tags:
  - Compliance
  - Verification
  - IRS
  - Due Diligence
  properties:
  - type: Documentation
    url: https://developer.candid.org/reference/welcome
  - type: Portal
    url: https://developer.candid.org/
- aid: candid:demographics-api
  name: Candid Demographics API
  description: Structured demographic data voluntarily provided by nonprofits about their staff, board, and populations served.
    Enables funders and platforms to analyze equity, diversity, and inclusion across the social sector.
  humanURL: https://developer.candid.org/reference/welcome
  baseURL: https://api.candid.org/demographics
  tags:
  - Demographics
  - DEI
  - Non-Profit
  tags_raw:
  - Demographics
  - DEI
  - Nonprofits
  properties:
  - type: Documentation
    url: https://developer.candid.org/reference/welcome
  - type: Portal
    url: https://developer.candid.org/
- aid: candid:grants-api
  name: Candid Grants API
  description: Access to Candid's global grants dataset — summary statistics, funders, recipients, and individual transaction
    records. Useful for philanthropic benchmarking, funder research, and grant-market intelligence.
  humanURL: https://developer.candid.org/reference/welcome
  baseURL: https://api.candid.org/grants
  tags:
  - Grants
  - Funders
  - Recipients
  - Transaction
  tags_raw:
  - Grants
  - Funders
  - Recipients
  - Transactions
  properties:
  - type: Documentation
    url: https://developer.candid.org/reference/welcome
  - type: Portal
    url: https://developer.candid.org/
- aid: candid:news-api
  name: Candid News API
  description: Search and retrieve philanthropic news content from Candid's curated news database covering funders, grantees,
    sector trends, and policy. Supports customizable parameters for date range, topic, geography, and organization.
  humanURL: https://developer.candid.org/reference/welcome
  baseURL: https://api.candid.org/news
  tags:
  - News
  - Philanthropy
  - Content
  properties:
  - type: Documentation
    url: https://developer.candid.org/reference/welcome
  - type: Portal
    url: https://developer.candid.org/
- aid: candid:taxonomy-api
  name: Candid Taxonomy API
  description: Returns Candid's philanthropic classification system (subject, population, support-strategy, and geographic
    area taxonomies) so integrators can consistently tag and query nonprofit, grant, and funder records.
  humanURL: https://developer.candid.org/reference/welcome
  baseURL: https://api.candid.org/taxonomy
  tags:
  - Taxonomy
  - Classification
  - Metadata
  properties:
  - type: Documentation
    url: https://developer.candid.org/reference/welcome
  - type: Portal
    url: https://developer.candid.org/
- aid: candid:nonprofit-eligibility-api
  name: Candid Nonprofit Eligibility API
  description: Evaluates whether a given nonprofit is eligible to receive a grant or donation based on configurable rules
    — IRS status, country, OFAC, custom program criteria — to automate grantmaking and giving workflows.
  humanURL: https://developer.candid.org/reference/welcome
  baseURL: https://api.candid.org/eligibility
  tags:
  - Eligibility
  - Grantmaking
  - Compliance
  properties:
  - type: Documentation
    url: https://developer.candid.org/reference/welcome
  - type: Portal
    url: https://developer.candid.org/
- aid: candid:candid-lookup-api
  name: Candid Lookup API
  description: Operations for retrieving lookup values and filter metadata.
  humanURL: https://developer.candid.org/reference/welcome
  baseURL: https://api.candid.org/essentials
  tags:
  - Lookup
  properties:
  - type: OpenAPI
    url: openapi/candid-lookup-api-openapi.yml
  - type: Documentation
    url: https://developer.candid.org/reference/welcome
  - type: Portal
    url: https://developer.candid.org/
- aid: candid:candid-search-api
  name: Candid Search API
  description: Operations for searching the Candid nonprofit database.
  humanURL: https://developer.candid.org/reference/welcome
  baseURL: https://api.candid.org/essentials
  tags:
  - Search
  properties:
  - type: OpenAPI
    url: openapi/candid-search-api-openapi.yml
  - type: Documentation
    url: https://developer.candid.org/reference/welcome
  - type: Portal
    url: https://developer.candid.org/
common:
- type: AgenticAccess
  url: agentic-access/candid-agentic-access.yml
- type: DomainSecurity
  url: security/candid-domain-security.yml
- type: Authentication
  url: authentication/candid-authentication.yml
- type: GitHubOrganization
  url: https://github.com/CandidOrg
- type: LinkedIn
  url: https://www.linkedin.com/company/candiddotorg
- type: Website
  url: https://candid.org
- type: DeveloperPortal
  url: https://developer.candid.org/
- type: DataPortal
  url: https://data.candid.org/reference/welcome-to-candids-data-portal
- type: APIsOverview
  url: https://candid.org/use-our-data
- type: PricingAndAccess
  url: https://candid.org/use-our-data
- type: PrivacyPolicy
  url: https://candid.org/privacy-policy
- type: TermsOfService
  url: https://candid.org/terms-of-use
- type: Support
  url: https://help.candid.org/
- type: Integrations
  url: https://candid.org/partners/
- type: LlmsText
  url: https://developer.candid.org/llms.txt
integrations:
- name: Candid
- name: footer
- name: Candid's 2026 Platinum Seal of Transparency
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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