Feathr

Feathr provides a unified digital marketing platform that helps arts & culture organizations, associations, nonprofits, and mission‑driven partners engage audiences, automate email, run digital advertising, and track conversions. Their AI‑driven audience building tools simplify fundraising and event promotion, offering personalized pricing plans for organizations of any size.

Feathr is listed with 1 API on the APIs.io network. Tagged areas include Company, Digital Marketing, AI, Nonprofit, and Event Promotion.

The Feathr catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 1 Spectral governance ruleset.

Feathr’s developer surface includes authentication, support, pricing, engineering blog, getting-started guide, documentation, and 16 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

35.2/100 thin Agent 29/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API

Company Digital MarketingAINonprofitEvent Promotion

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 35.2/100 · thin

Contract Quality 7.2 / 21

Developer Ergonomics 6.9 / 17

Access Clarity 5.4 / 17

Operational Transparency 1.5 / 11

Contract Governance 2.2 / 10

Discoverability 5.8 / 9

Regulatory Posture 3.4 / 15

Agent readiness — 29/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 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 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 0 / 5

Well-Known Catalog 4 / 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

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/.

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

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

8 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 33.9 — up to +16.5 composite points
Access Clarity scores 31.6 — up to +13.7 composite points
Developer Ergonomics scores 40.5 — up to +11.9 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/feathr/apis.yml: open an issue on github.com/api-evangelist/feathr 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 →

APIs 1

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

Feathr API

Feathr API as documented publicly: 6 operations. Contract generated from the documentation by API Evangelist (2026-10-27); not the provider's own document.

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Feathr Webhooks

ASYNCAPI

Semantic Vocabularies 1

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

Feathr Context

5 classes · 35 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Feathr API Rules

11 rules · 9 errors 1 warnings 1 info

SPECTRAL

JSON Schema 5

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

GetMeResponse

3 properties

JSON SCHEMA

GetPersonsIdResponse

26 properties

JSON SCHEMA

GetPersonsResponse

4 properties

JSON SCHEMA

PostWebhooksIdRotateSecretResponse

1 properties

JSON SCHEMA

PostWebhooksRequest

3 properties

JSON SCHEMA

Security Posture 2

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

Feathr Authentication

1 scheme

SECURITY

Feathr Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

Webhooks

DataModel

Conventions

Conformance

Scroll for all 7

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Pricing

Pricing

Company 3

The organization behind the API

Newsroom

Newsroom

Blog

Blog

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: feathr
name: Feathr
image: https://www.feathr.co/hubfs/Feathr_Featured_logo-1200x600-show-up-where-it-matters.png
description: Feathr provides a unified digital marketing platform that helps arts & culture organizations, associations, nonprofits,
  and mission‑driven partners engage audiences, automate email, run digital advertising, and track conversions. Their AI‑driven
  audience building tools simplify fundraising and event promotion, offering personalized pricing plans for organizations
  of any size.
url: https://raw.githubusercontent.com/api-evangelist/feathr/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-27 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-27'
modified: '2026-10-27'
tags:
- Company
- Digital Marketing
- AI
- Nonprofit
- Event Promotion
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Spectral
  url: rules/feathr-rules.yml
- type: JSONLD
  url: json-ld/feathr-context.jsonld
- type: Vocabulary
  url: vocabulary/feathr-vocabulary.yml
- type: Webhooks
  url: asyncapi/feathr-webhooks.yml
- type: DataModel
  url: data-model/feathr-data-model.yml
- type: Conventions
  url: conventions/feathr-conventions.yml
- type: Authentication
  url: authentication/feathr-authentication.yml
- type: Conformance
  url: conformance/feathr-conformance.yml
- type: LLMsTxt
  url: llms/feathr-llms.txt
- type: Hosts
  url: hosts/feathr-hosts.yml
- type: Vendors
  url: vendors/feathr-vendors.yml
- type: TermsOfService
  url: https://www.feathr.co/terms
- type: Support
  url: https://help.feathr.co/hc/en-us
- type: PrivacyPolicy
  url: https://www.feathr.co/privacy-policy?hsLang=en
- type: Pricing
  url: https://www.feathr.co/pricing
- type: Newsroom
  url: https://www.feathr.co/resources/newsroom
- type: Blog
  url: https://www.feathr.co/resources/blog
- type: GettingStarted
  url: https://docs.feathr.co/getting-started
- type: Documentation
  url: https://dev.feathr.co/
- type: GitHubOrganization
  url: https://github.com/Feathr
- type: DomainSecurity
  url: security/feathr-domain-security.yml
- type: Website
  url: https://feathr.co/
apis:
- aid: feathr:feathr-api
  name: Feathr API
  description: 'Feathr API as documented publicly: 6 operations. Contract generated from the documentation by API Evangelist
    (2026-10-27); not the provider''s own document.'
  humanURL: https://docs.feathr.co/webhooks
  baseURL: https://api.feathr.co
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/feathr-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/feathr-get-persons-id-response-schema.json
  - type: JSONSchema
    url: json-schema/feathr-get-persons-response-schema.json
  - type: JSONSchema
    url: json-schema/feathr-get-me-response-schema.json
  - type: JSONSchema
    url: json-schema/feathr-post-webhooks-request-schema.json
  - type: JSONSchema
    url: json-schema/feathr-post-webhooks-id-rotate-secret-response-schema.json
x-submission-probe: 301 (-> https://www.feathr.co/) 2026-10-26
x-coverage:
  state: gated
  reason: partner-login
  method: derived
  generated: '2026-10-27'
  generator: derive-coverage.py (pre-flight evidence)
  detail: the company serves an API surface but requires credentials before any description of it can be read
  evidence:
  - url: https://api.feathr.co/openapi.json
    status: null
  - url: https://developers.feathr.co/mcp
    status: 401
  - url: https://feathr.co/
    status: 200
x-enrichment:
  date: '2026-10-27'
  status: enriched
  artifacts_added: 24
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Feathr API — frequently asked questions

Does Feathr have an API?

Yes. APIs.io lists 1 API from Feathr, including Feathr API.

Is there an OpenAPI specification for the Feathr API?

Yes. APIs.io indexes 1 OpenAPI specification for Feathr, each linked for download from this page.

How do I authenticate with the Feathr API?

Feathr uses bearer-token authentication (1 scheme). The details are profiled on APIs.io as Feathr Authentication.

Is the Feathr API ready for AI agents?

Feathr has a Kin Score of 35.2 out of 100 (thin) and an Agent Readiness score of 29.3 (agent-ready), scored by API Evangelist on 2026-10-31.

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