501c3.HELP

501c3.HELP provides comprehensive services to help nonprofit organizations establish and run a 501(c)(3) status in the United States. It offers legal guidance, operational tools, funding resources, and ongoing support across all 50 states, empowering founders to unlock grants, tax benefits, and cloud credits while ensuring compliance and sustainable growth.

501c3.HELP is listed with 1 API on the APIs.io network. Tagged areas include Non-Profit, Legal, Funding, and Education.

501c3.HELP’s developer surface includes signup flow, documentation, and 7 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

7.9/100 minimal ▼ -5.8 Agent 3/100 human only Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API

Non-Profit Legal Funding Education

Kin Score

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

Composite quality — 7.9/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.8 / 17

Access Clarity 2.9 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.1 / 9

Regulatory Posture 1.5 / 15

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 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 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Education & Research 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/.

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

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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)
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

12 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 4.8 — up to +19.0 composite points
Access Clarity scores 17.1 — up to +16.6 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/501c3-help/apis.yml: open an issue on github.com/api-evangelist/501c3-help 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.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

APIs 1

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

501c3.help API

Provides services to help nonprofit organizations establish and run a 501(c)(3) status, as described on the homepage.

Security Posture 1

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

501C3 Help Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

SignUp

SignUp

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: 501c3-help
name: 501c3.HELP
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: none
  source:
  - security
  generated: '2026-11-06'
  method: derived
image: https://501c3.help/images/og-image-v2.jpg
description: 501c3.HELP provides comprehensive services to help nonprofit organizations establish and run a 501(c)(3) status
  in the United States. It offers legal guidance, operational tools, funding resources, and ongoing support across all 50
  states, empowering founders to unlock grants, tax benefits, and cloud credits while ensuring compliance and sustainable
  growth.
url: https://artifacts.apis.io/501c3-help/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-31 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-31'
modified: '2026-10-31'
tags:
- Non-Profit
- Legal
- Funding
- Education
tags_raw:
- Nonprofit
- Legal
- Funding
- Operations
- Education
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: LLMsTxt
  url: llms/501c3-help-llms.txt
- type: Hosts
  url: hosts/501c3-help-hosts.yml
- type: Vendors
  url: vendors/501c3-help-vendors.yml
- type: TermsOfService
  url: https://501c3.help/tos/
- type: SignUp
  url: https://501c3.help/signup/
- type: PrivacyPolicy
  url: https://501c3.help/privacy_policy/
- type: DomainSecurity
  url: security/501c3-help-domain-security.yml
- type: Website
  url: https://501c3.help/
- type: Documentation
  url: https://501c3.help/mcp/
apis:
- name: 501c3.help API
  description: Provides services to help nonprofit organizations establish and run a 501(c)(3) status, as described on the
    homepage.
  humanURL: https://501c3.help/
  aid: 501c3-help:501c3-help-api
x-coverage:
  state: none
  reason: no-developer-program
  detail: No public API documentation or machine‑readable contract was found on the provider's site.
  evidence:
  - url: https://api.501c3.help/openapi.json
    status: 0
  - url: https://api.501c3.help/openapi.yaml
    status: 0
  checked: '2026-10-31'
x-enrichment:
  date: '2026-10-31'
  status: enriched
  artifacts_added: 9
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

501c3.HELP API — frequently asked questions

Does 501c3.HELP have an API?

Yes. APIs.io lists 1 API from 501c3.HELP, including 501c3.help API.

Is the 501c3.HELP API ready for AI agents?

501c3.HELP has a Kin Score of 7.9 out of 100 (minimal) and an Agent Readiness score of 3.1 (human-only), scored by API Evangelist on 2026-11-06.

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