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 API contracts indexed 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 engineering blog, authentication, documentation, pricing, signup flow, support, and 14 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

35.5/100 thin ▬ flat Agent 48/100 agent ready Front door AI 5/6 prominent Heartbeat 16/100 dormant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract 1 MCP Servers

501c3Charities DonationsEINIRS Non-Profit Tax Compliance Verification

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 35.5/100 · thin

Contract Quality 11.6 / 21

Developer Ergonomics 7.1 / 17

Access Clarity 3.6 / 17

Operational Transparency 0.9 / 11

Contract Governance 1.0 / 10

Discoverability 5.8 / 9

Regulatory Posture 2.5 / 15

Agent readiness — 48/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 0 / 5

Distinct Operations 3 / 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 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.

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/.

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

Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Pagination +5 pts — share of collection GETs (an array, or one wrapped in data/items/results ...) that declare a page/limit/offset/cursor parameter, a Link header or a next/cursor field; na with no collection GETs
Agent Skills +5 pts — skills artifact present, graded by who authored it

3 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 21.1 — up to +15.8 composite points
Operational Transparency scores 7.9 — up to +12.0 composite points
Developer Ergonomics scores 41.7 — up to +11.7 composite points

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.

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/charityapi/apis.yml: open an issue on github.com/api-evangelist/charityapi 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Nonprofit and Fundraising	undeclared	-	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 4

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (verified)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

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 4

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

Charity Autocomplete API

OPEN COLLECTION

Charity Autocomplete Organizations API

OPEN COLLECTION

Charity Autocomplete Public Charity Check API

OPEN COLLECTION

CharityAPI

OPEN COLLECTION

MCP Servers 1

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

CharityAPI MCP Server

Remote MCP server at api.charityapi.org over HTTP.

MCP SERVER

CharityAPI pricing

Not yet checked against CharityAPI's own pricing page. Compiled by API Evangelist on 2026-05-04; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free
Professional paid	Free
Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Free Tier Monthly Quota: 1000 requests per month
Professional Tier Default: 100 requests per minute

Compiled by API Evangelist, not yet checked against CharityAPI's documentation. All 5 limits →

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

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

CharityAPI

SLA

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 — jsonschema 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

Build 1

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

Support

Support

Commercial 5

Pricing, plans, and the legal terms of use

Plans

FinOps

Pricing

TermsOfService

PrivacyPolicy

Company 4

The organization behind the API

Blog

BlogRSS

Website

Blog

Source (apis.yml)

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
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  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: '2026-10-06'
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: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/charityapi/overview
- type: Plans
  url: plans/charityapi-plans-pricing.yml
- type: RateLimits
  url: rate-limits/charityapi-rate-limits.yml
- type: FinOps
  url: finops/charityapi-finops.yml
- url: https://www.charityapi.org/news
  type: Blog
- url: https://www.charityapi.org/news/feed.xml
  type: BlogRSS
- 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

CharityAPI — frequently asked questions

Does CharityAPI have an API?

Yes. APIs.io lists 3 APIs from CharityAPI, including CharityAPI Autocomplete API, CharityAPI Organizations API and CharityAPI Public Charity Check API.

Is there an OpenAPI specification for the CharityAPI?

Yes. APIs.io indexes 3 OpenAPI specifications for CharityAPI, each linked for download from this page.

How do I authenticate with the CharityAPI?

CharityAPI documents its authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Charityapi Authentication.

How much does the CharityAPI cost?

APIs.io lists 3 pricing plans for CharityAPI, with each plan's price, limits and inclusions under Pricing on this page.

Does CharityAPI have an MCP server?

Yes. APIs.io lists 1 MCP server for CharityAPI: Remote MCP server at api.charityapi.org over HTTP.

Is the CharityAPI ready for AI agents?

CharityAPI has a Kin Score of 35.5 out of 100 (thin) and an Agent Readiness score of 47.5 (agent-ready), scored by API Evangelist on 2026-11-06.

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