# Fillo

**Canonical:** https://apis.io/providers/fillo-so/  
**Website:** https://fillo.so/  
**APIs profiled:** 1

Fillo is a forms-as-infrastructure product that lets coding agents and developers build structured forms into their own products without hand-building the backend. The service handles validation, file uploads, versioning, response storage, webhooks, and delivery, and exposes a Management API, SDKs, CLI, and embeddable form widgets so flows like support requests, beta access, product feedback, approvals, cancellations, and data export requests can be dropped into any application.

## Kin Score — 67.5 / 100 (exemplar)

Scored 2026-11-13 under rubric 0.28.0.

| Facet | Score |
|---|---|
| Discoverability | 65.0 |
| Contract Quality | 77.8 |
| Contract Governance | 35.6 |
| Operational Transparency | 71.4 |
| Developer Ergonomics | 63.7 |
| Access Clarity | 61.7 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 34.3 (matched via fallback).

## Agent readiness — 51.1 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | served |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | verified |
| Event Surface Described | yes |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | served |
| Protected Resource Metadata | verified |
| Dynamic Client Registration | yes |
| Agentic Commerce | no |
| Pagination Ratio | partial |
| Operation Distinctiveness | distinct |
| MCP Tool Quality | na |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (14)

- **Fillo Agents API** — The Agents API from Fillo — 2 operation(s) for agents.
- **Fillo Credentials API** — The Credentials API from Fillo — 4 operation(s) for credentials.
- **Fillo Deliveries API** — The Deliveries API from Fillo — 3 operation(s) for deliveries.
- **Fillo Fillo Management API** — The Fillo Management API API from Fillo — 1 operation(s) for fillo management api.
- **Fillo Forms API** — The Forms API from Fillo — 6 operation(s) for forms.
- **Fillo Insights API** — The Insights API from Fillo — 1 operation(s) for insights.
- **Fillo Integrations API** — The Integrations API from Fillo — 8 operation(s) for integrations.
- **Fillo Members API** — The Members API from Fillo — 4 operation(s) for members.
- **Fillo Respondents API** — The Respondents API from Fillo — 3 operation(s) for respondents.
- **Fillo Responses API** — The Responses API from Fillo — 6 operation(s) for responses.
- **Fillo Settings API** — The Settings API from Fillo — 1 operation(s) for settings.
- **Fillo Storage API** — The Storage API from Fillo — 2 operation(s) for storage.
- **Fillo Webhooks API** — The Webhooks API from Fillo — 2 operation(s) for webhooks.
- **Fillo Workspace API** — The Workspace API from Fillo — 5 operation(s) for workspace.

## MCP servers (1)

- **Fillo MCP server** — Fillo's hosted Model Context Protocol server lets a coding agent sign in with OAuth 2.1 (S256 PKCE + Dynamic Client Registration), choose a workspace/project, and build, publish...

## Agentic access (1)

- **Fillo Agentic Access** — 65 operations · 37 acting · 6 human-in-the-loop

## Security (2)

- **Fillo Authentication** — http/oauth2 · 2 schemes
- **Fillo Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Fillo Plans Pricing**

## Tags

Forms, Form Builder, Developer Tools, Embeddable Widgets, Webhook, Validation, File Uploads, SDK, CLI, Management API

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/fillo-so/). Scores are computed from the provider's own public artifacts under a published rubric.