Formboost

Form-backend-as-a-service with a single unauthenticated HTTP POST submission endpoint for any frontend or static site. Submissions land in an inbox and searchable dashboard and can fan out to Google Sheets, email, Slack, Discord, Telegram, Zapier, n8n, and webhooks. No backend code, server, or database required.

Formboost publishes 1 API on the APIs.io network. Tagged areas include Forms, form-backend, HTML Forms, Serverless, and Static Sites.

The Formboost catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Formboost’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, signup flow, and 24 more developer resources.

🌐 Visit website 📡 Source on GitHub
56.4/100 strong ▬ flat Agent 25/100 agent aware Front door AI 3/6 light Full breakdown ↓
scored 2026-09-21 · rubric v0.22.0
1 APIs
Formsform-backendHTML FormsServerlessStatic SitesReactNext.jsVueWebhookNo-CodeDeveloper ToolsSpam Filtering

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-21 · rubric v0.22.0
Composite quality — 56.4/100 · strong
Contract Quality 10.4 / 25
Developer Ergonomics 9.5 / 20
Access Clarity 15.8 / 20
Operational Transparency 10.9 / 13
Contract Governance 2.2 / 12
Discoverability 7.6 / 10
Agent readiness — 25/100 · agent aware
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 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 6 / 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
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.
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/formboost: 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 1

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

Formboost Form Submission API

Single public unauthenticated HTTP endpoint (POST https://formboost.app/f/{alias}) that accepts JSON or form-encoded submissions. Returns 202 to JSON clients and 302 to HTML for...

Pricing Plans 1

Published pricing tiers and plan structures.

Formboost Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Formboost Rate Limits

5 limits

RATE LIMITS

Event Specifications 1

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

Formboost Webhooks

ASYNCAPI

Security Posture 4

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

Formboost Authentication

4 schemes

SECURITY

Formboost Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Formboost Vulnerability Disclosure

Hackerone · contact published

SECURITY

Formboost Trust Center

trust center published

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 SignUp
SignUp

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Lifecycle
Lifecycle
 Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 Webhooks
Webhooks
 Conformance
Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages

Access & Security 6

Authentication, authorization, and security posture

Security
Security
 Authentication
Authentication
 Compliance
Compliance
 TrustCenter
TrustCenter
 VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity

Operate 6

Status, limits, changes, and where to get help

Support
Support
 HelpCenter
HelpCenter
 StatusPage
StatusPage
 ChangeLog
ChangeLog
 ChangeLog
ChangeLog
 RateLimits
RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy
 Plans
Plans

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
name: Formboost
description: Form-backend-as-a-service with a single unauthenticated HTTP POST submission endpoint for any frontend or static
  site. Submissions land in an inbox and searchable dashboard and can fan out to Google Sheets, email, Slack, Discord, Telegram,
  Zapier, n8n, and webhooks. No backend code, server, or database required.
url: https://raw.githubusercontent.com/api-evangelist/formboost/refs/heads/main/apis.yml
image: https://formboost.app/og.png
created: '2026-09-02'
modified: '2026-09-02'
specificationVersion: '0.21'
tags:
- Forms
- form-backend
- HTML Forms
- Serverless
- Static Sites
- React
- Next.js
- Vue
- Webhook
- No-Code
- Developer Tools
- Spam Filtering
tags_raw:
- forms
- form-backend
- html-forms
- serverless
- static-sites
- react
- nextjs
- vue
- webhooks
- no-code
- developer-tools
- spam-filtering
apis:
- name: Formboost Form Submission API
  description: Single public unauthenticated HTTP endpoint (POST https://formboost.app/f/{alias}) that accepts JSON or form-encoded
    submissions. Returns 202 to JSON clients and 302 to HTML form posts. Discovery via a confirmed llms.txt.
  humanURL: https://formboost.app/docs/api-reference-and-config
  baseURL: https://formboost.app
  tags:
  - Forms
  - form-backend
  - HTML Forms
  - Serverless
  - Static Sites
  - React
  - Next.js
  - Vue
  - Webhook
  - No-Code
  - Developer Tools
  - Spam Filtering
  tags_raw:
  - forms
  - form-backend
  - html-forms
  - serverless
  - static-sites
  - react
  - nextjs
  - vue
  - webhooks
  - no-code
  - developer-tools
  - spam-filtering
  properties:
  - type: Documentation
    url: https://formboost.app/docs
  - type: APIReference
    url: https://formboost.app/docs/api-reference-and-config
  - type: GettingStarted
    url: https://formboost.app/docs/getting-started
  - type: LLMsTxt
    url: https://formboost.app/llms.txt
  - type: LLMsTxt
    url: llms/formboost-llms.txt
  - type: Authentication
    url: authentication/formboost-authentication.yml
  - type: ErrorCatalog
    url: errors/formboost-problem-types.yml
  - type: RateLimits
    url: rate-limits/formboost-rate-limits.yml
  - type: Conventions
    url: conventions/formboost-conventions.yml
  - type: Webhooks
    url: asyncapi/formboost-webhooks.yml
maintainers:
- FN: Formboost
  url: https://formboost.app
  email: support@formboost.app
common:
- type: Website
  url: https://www.formboost.app/
- type: Documentation
  url: https://formboost.app/docs
- type: DeveloperPortal
  url: https://dashboard.formboost.app
- type: APIReference
  url: https://formboost.app/docs/api-reference-and-config
- type: GettingStarted
  url: https://formboost.app/docs/getting-started
- type: Support
  url: https://formboost.app/support
- type: HelpCenter
  url: https://formboost.app/faq
- type: Blog
  url: https://formboost.app/blog
- type: GitHubOrganization
  url: https://github.com/formboost
- type: Pricing
  url: https://formboost.app/pricing
- type: SignUp
  url: https://dashboard.formboost.app/signup
- type: TermsOfService
  url: https://formboost.app/terms
- type: PrivacyPolicy
  url: https://formboost.app/privacy
- type: Security
  url: https://formboost.app/security
- type: StatusPage
  url: https://status.formboost.app
- type: ChangeLog
  url: https://formboost.app/changelog
- type: LLMsTxt
  url: llms/formboost-llms.txt
- type: ChangeLog
  url: changelog/formboost-changelog.yml
- type: Lifecycle
  url: lifecycle/formboost-lifecycle.yml
- type: Plans
  url: plans/formboost-plans-pricing.yml
- type: RateLimits
  url: rate-limits/formboost-rate-limits.yml
- type: Authentication
  url: authentication/formboost-authentication.yml
- type: Conventions
  url: conventions/formboost-conventions.yml
- type: ErrorCatalog
  url: errors/formboost-problem-types.yml
- type: Webhooks
  url: asyncapi/formboost-webhooks.yml
- type: Conformance
  url: conformance/formboost-conformance.yml
- type: Compliance
  url: conformance/formboost-conformance.yml
- type: TrustCenter
  url: security/formboost-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/formboost-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/formboost-domain-security.yml
- type: Packages
  url: packages/formboost-packages.yml
x-enrichment:
  date: '2026-09-02'
  status: enriched
  artifacts_added: 16
  pass: local-v1
generated:
  by: apis.io/add
  model: claude-opus-4-8
  confidence: 95
  at: '2026-09-02T12:26:45.044Z'

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