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 is listed with 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 📡 Profile data on GitHub

59.2/100 strong ▬ flat Agent 25/100 agent aware Front door AI 3/6 light Heartbeat 97/100 alive Full breakdown ↓
scored 2026-11-02 · rubric v0.26.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 API

FormsForm BackendHTML FormsServerless Static Sites React Next.js Vue Webhook No-Code Developer Tools Spam Filtering

Kin Score

Kin Score How this is scored →
scored 2026-11-02 · rubric v0.26.0

Composite quality — 59.2/100 · strong

Contract Quality 8.3 / 21

Developer Ergonomics 8.1 / 17

Access Clarity 14.8 / 17

Operational Transparency 9.3 / 11

Contract Governance 1.9 / 10

Discoverability 5.5 / 9

Regulatory Posture 5.3 / 15

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

Pagination 5 / 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 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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<a href="https://apis.io/providers/formboost/"><img src="https://apis.io/badge/formboost/card.svg" alt="Formboost on APIs.io — Kin Score by API Evangelist"></a>

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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
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

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 39.0 — up to +15.3 composite points
Developer Ergonomics scores 47.6 — up to +10.5 composite points
Contract Governance scores 18.2 — up to +9.8 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/formboost/apis.yml: open an issue on github.com/api-evangelist/formboost 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
Surveys, Market Research and Experience Management	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.

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 2

Published pricing tiers and plan structures.

Formboost Plans Pricing

4 plans

PLANS

Formboost Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Formboost Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Formboost Finops

FINOPS

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

Conventions

ErrorCatalog

Webhooks

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

Authentication

Compliance

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 6

Status, limits, changes, and where to get help

Support

HelpCenter

StatusPage

ChangeLog

ChangeLog

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

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
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  generated: '2026-11-02'
  method: derived
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
  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'

Formboost API — frequently asked questions

Does Formboost have an API?

Yes. APIs.io lists 1 API from Formboost, including Formboost Form Submission API.

How do I authenticate with the Formboost API?

Formboost uses bearer-token authentication (4 schemes). The details are profiled on APIs.io as Formboost Authentication.

How much does the Formboost API cost?

APIs.io lists 4 pricing plans for Formboost, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the Formboost API ready for AI agents?

Formboost has a Kin Score of 59.2 out of 100 (strong) and an Agent Readiness score of 25.2 (agent-aware), scored by API Evangelist on 2026-11-02.

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