Formspree website screenshot

Formspree

Formspree is a form backend for static and Jamstack sites. Two API surfaces matter: (1) the public form-submission endpoint (formspree.io/f/{hashid}) that accepts POST submissions and returns JSON when the Accept header is set, and (2) the Forms API (formspree.io/api/0/...) for programmatic submission retrieval, export and form management. Plugins and the Formspree CLI extend the surface.

Formspree publishes 3 APIs on the APIs.io network, including Forms API, and 2 more. Tagged areas include Forms, Backend, Static Sites, Email, and Webhook.

Formspree’s developer surface includes authentication, documentation, pricing, GitHub presence, and 11 more developer resources.

🌐 Visit website 📡 Source on GitHub
35.1/100 thin ▬ flat Agent 21/100 agent aware Front door AI 4/6 moderate saas Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0
AccessFreemiumSelf serve⚡ Free to try
1 APIs
FormsBackendStatic SitesEmailWebhookJAMstackCLI

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0
Composite quality — 35.1/100 · thin
Contract Quality 10.9 / 21
Developer Ergonomics 3.6 / 17
Access Clarity 5.8 / 17
Operational Transparency 2.3 / 11
Contract Governance 0.0 / 10
Discoverability 6.2 / 9
Regulatory Posture 3.4 / 15
Agent readiness — 21/100 · 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
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/.
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/formspree: 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.

Formspree Form Submission Endpoint

Public POST endpoint per form. Accepts standard HTML form posts and cross-origin AJAX (Accept: application/json) and returns JSON. No auth for the submission itself; per-form sp...

Formspree Forms API

REST API for retrieving submissions and managing forms. Endpoints under /api/0/forms//. Bearer auth using a public read-only API key or a Master API key (paid plans only...

Formspree Forms API

The Forms API from Formspree — 1 operation(s) for forms.

Open Collections 3

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

API Collection

OPEN COLLECTION

Formspree Form Submissions Forms API

OPEN COLLECTION

Formspree Form Submissions API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Formspree Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Formspree Rate Limits

3 limits

RATE LIMITS

FinOps 1

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

Formspree Finops

FINOPS

Security Posture 4

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

Formspree Authentication

http · 1 scheme

SECURITY

Formspree Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Formspree Vulnerability Disclosure

disclosure policy published

SECURITY

Formspree Trust Center

SOC 2, GDPR

SECURITY

Agentic Access 1

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

Formspree Agentic Access

1 operation

1 operations · 0 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

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

GitHub
GitHub

Access & Security 4

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 2

Status, limits, changes, and where to get help

StatusPage
StatusPage
 RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 Plans
Plans
 FinOps
FinOps

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: formspree
url: https://raw.githubusercontent.com/api-evangelist/formspree/refs/heads/main/apis.yml
name: Formspree
kind: company
description: 'Formspree is a form backend for static and Jamstack sites. Two API surfaces matter: (1) the public form-submission
  endpoint (formspree.io/f/{hashid}) that accepts POST submissions and returns JSON when the Accept header is set, and (2)
  the Forms API (formspree.io/api/0/...) for programmatic submission retrieval, export and form management. Plugins and the
  Formspree CLI extend the surface.'
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: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/formspree.png
tags:
- Forms
- Backend
- Static Sites
- Email
- Webhook
- JAMstack
- CLI
tags_raw:
- Forms
- Backend
- Static Sites
- Email
- Webhooks
- JAMstack
- CLI
created: '2026-05-08'
modified: '2026-05-08'
specificationVersion: '0.23'
apis:
- aid: formspree:submission
  name: Formspree Form Submission Endpoint
  description: 'Public POST endpoint per form. Accepts standard HTML form posts and cross-origin AJAX (Accept: application/json)
    and returns JSON. No auth for the submission itself; per-form spam controls.'
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://help.formspree.io/hc/en-us/articles/360015233153-Form-Submissions-API
  baseURL: https://formspree.io/f/<hashid>
  tags:
  - REST
  - Submissions
  - AJAX
  properties:
  - type: Documentation
    url: https://help.formspree.io/hc/en-us/articles/360015233153-Form-Submissions-API
- aid: formspree:forms-api
  name: Formspree Forms API
  description: REST API for retrieving submissions and managing forms. Endpoints under /api/0/forms/<hashid>/. Bearer auth
    using a public read-only API key or a Master API key (paid plans only). Supports since/limit/offset.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://help.formspree.io/sections/the-forms-api/
  baseURL: https://formspree.io/api/0
  tags:
  - REST
  - Submissions
  - Management
  - Pagination
  properties:
  - type: Documentation
    url: https://help.formspree.io/sections/the-forms-api/
  - type: APIKeys
    url: https://help.formspree.io/articles/the-forms-api/api-keys/
- aid: formspree:formspree-forms-api
  name: Formspree Forms API
  description: The Forms API from Formspree — 1 operation(s) for forms.
  humanURL: https://help.formspree.io/hc/en-us/articles/360015233153-Form-Submissions-API
  baseURL: https://formspree.io/f/<hashid>
  tags:
  - Forms
  properties:
  - type: OpenAPI
    url: openapi/formspree-forms-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/formspree-agentic-access.yml
- type: TrustCenter
  url: security/formspree-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/formspree-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/formspree-domain-security.yml
- type: Authentication
  url: authentication/formspree-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/formspree
- type: Website
  url: https://formspree.io/
- type: Documentation
  url: https://help.formspree.io/
- type: Pricing
  url: https://formspree.io/plans
- type: GitHub
  url: https://github.com/formspree
- type: StatusPage
  url: https://www.formspreestatus.com/
- type: Plans
  url: plans/formspree-plans-pricing.yml
- type: RateLimits
  url: rate-limits/formspree-rate-limits.yml
- type: FinOps
  url: finops/formspree-finops.yml
- type: LlmsText
  url: https://formspree.io/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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