CharityAPI website screenshot

CharityAPI

CharityAPI provides a simple REST API for data about US nonprofits and charities sourced directly from IRS filings. Developers can retrieve nonprofit records by EIN, verify whether an organization is a public charity (501c3) with tax-deductible status, and integrate organization name autocomplete to power donation, vetting, and compliance workflows.

CharityAPI publishes 3 APIs on the APIs.io network: Autocomplete API, Organizations API, and Public Charity Check API. Tagged areas include 501c3, Charities, Donations, EIN, and IRS.

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

CharityAPI’s developer surface includes authentication, documentation, pricing, engineering blog, signup flow, support, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub
38.1/100 thin ▬ flat Agent 23/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
AccessFreemiumSelf serve⚡ Free to try
1 APIs
501c3CharitiesDonationsEINIRSNon-ProfitTax ComplianceVerification

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 38.1/100 · thin
Contract Quality 15.1 / 25
Developer Ergonomics 8.1 / 20
Access Clarity 5.8 / 20
Operational Transparency 1.0 / 13
Contract Governance 1.2 / 12
Discoverability 6.9 / 10
Agent readiness — 23/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 6 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 9 / 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 4 / 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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.
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/charityapi: 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 3

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

CharityAPI Autocomplete API

Typeahead search across nonprofit organization names

CharityAPI Organizations API

Look up US nonprofit organization records by EIN

CharityAPI Public Charity Check API

Verify whether an EIN is a tax-deductible public charity

Open Collections 5

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

API Collection

OPEN COLLECTION

Charity Autocomplete API

OPEN COLLECTION

Charity Autocomplete Organizations API

OPEN COLLECTION

Charity Autocomplete Public Charity Check API

OPEN COLLECTION

CharityAPI

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Charityapi Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Charityapi Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Charityapi Finops

FINOPS

Semantic Vocabularies 1

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

Charityapi Context

0 classes · 2 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

CharityAPI API Rules

5 rules · 4 warnings 1 info

SPECTRAL

JSON Schema 2

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

CharityAPI Organization

20 properties

JSON SCHEMA

CharityAPI Public Charity Check

2 properties

JSON SCHEMA

Security Posture 2

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

Charityapi Authentication

apiKey · 1 scheme

SECURITY

Charityapi Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Charityapi Agentic Access

3 operations

3 operations · 0 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Signup
Signup

Documentation 3

Reference material describing how the API behaves

Documentation
Documentation
 JSONSchema
JSONSchema
 JSONSchema
JSONSchema

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

JSONLD
JSONLD

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

Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: charityapi
name: CharityAPI
description: CharityAPI provides a simple REST API for data about US nonprofits and charities sourced directly from IRS filings.
  Developers can retrieve nonprofit records by EIN, verify whether an organization is a public charity (501c3) with tax-deductible
  status, and integrate organization name autocomplete to power donation, vetting, and compliance workflows.
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/charityapi.png
url: https://raw.githubusercontent.com/api-evangelist/charityapi/refs/heads/main/apis.yml
type: Index
access: 3rd-Party
position: Consuming
tags:
- 501c3
- Charities
- Donations
- EIN
- IRS
- Non-Profit
- Tax Compliance
- Verification
tags_raw:
- 501c3
- Charities
- Donations
- EIN
- IRS
- Non-Profits
- Tax Compliance
- Verification
created: '2025-03-01'
modified: '2026-05-19'
specificationVersion: '0.23'
apis:
- aid: charityapi:charityapi-autocomplete-api
  name: CharityAPI Autocomplete API
  description: Typeahead search across nonprofit organization names
  humanURL: https://charityapi.org/
  baseURL: https://api.charityapi.org/api
  tags:
  - Autocomplete
  properties:
  - type: OpenAPI
    url: openapi/charityapi-autocomplete-api-openapi.yml
  - type: Documentation
    url: https://docs.charityapi.org/
  - type: GettingStarted
    url: https://docs.charityapi.org/main
  - type: Authentication
    url: https://docs.charityapi.org/authentication
  - type: Organizations
    url: https://docs.charityapi.org/organizations
  - type: Pricing
    url: https://www.charityapi.org/pricing
  - type: Signup
    url: https://www.charityapi.org/get-started
  - type: Spectral
    url: spectral/charityapi-spectral.yml
- aid: charityapi:charityapi-organizations-api
  name: CharityAPI Organizations API
  description: Look up US nonprofit organization records by EIN
  humanURL: https://charityapi.org/
  baseURL: https://api.charityapi.org/api
  tags:
  - Organization
  tags_raw:
  - Organizations
  properties:
  - type: OpenAPI
    url: openapi/charityapi-organizations-api-openapi.yml
  - type: Documentation
    url: https://docs.charityapi.org/
  - type: GettingStarted
    url: https://docs.charityapi.org/main
  - type: Authentication
    url: https://docs.charityapi.org/authentication
  - type: Organizations
    url: https://docs.charityapi.org/organizations
  - type: Pricing
    url: https://www.charityapi.org/pricing
  - type: Signup
    url: https://www.charityapi.org/get-started
  - type: Spectral
    url: spectral/charityapi-spectral.yml
- aid: charityapi:charityapi-public-charity-check-api
  name: CharityAPI Public Charity Check API
  description: Verify whether an EIN is a tax-deductible public charity
  humanURL: https://charityapi.org/
  baseURL: https://api.charityapi.org/api
  tags:
  - Public Charity Check
  properties:
  - type: OpenAPI
    url: openapi/charityapi-public-charity-check-api-openapi.yml
  - type: Documentation
    url: https://docs.charityapi.org/
  - type: GettingStarted
    url: https://docs.charityapi.org/main
  - type: Authentication
    url: https://docs.charityapi.org/authentication
  - type: Organizations
    url: https://docs.charityapi.org/organizations
  - type: Pricing
    url: https://www.charityapi.org/pricing
  - type: Signup
    url: https://www.charityapi.org/get-started
  - type: Spectral
    url: spectral/charityapi-spectral.yml
common:
- type: AgenticAccess
  url: agentic-access/charityapi-agentic-access.yml
- type: DomainSecurity
  url: security/charityapi-domain-security.yml
- type: Authentication
  url: authentication/charityapi-authentication.yml
- type: Website
  url: https://www.charityapi.org/
- type: Documentation
  url: https://docs.charityapi.org/
- type: Pricing
  url: https://www.charityapi.org/pricing
- type: Blog
  url: https://www.charityapi.org/blog
- type: Signup
  url: https://www.charityapi.org/get-started
- type: Support
  url: https://www.charityapi.org/contact
- type: TermsOfService
  url: https://www.charityapi.org/terms
- type: PrivacyPolicy
  url: https://www.charityapi.org/privacy
- type: JSONLD
  url: json-ld/charityapi-context.jsonld
- type: JSONSchema
  url: json-schema/charityapi-organization-schema.json
- type: JSONSchema
  url: json-schema/charityapi-public-charity-check-schema.json
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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