Mask API website screenshot

Mask API

Mask API is a powerful and flexible tool designed to help programmers and companies customize the response format of endpoint APIs, enabling selective field filtering and data transformation in API responses.

Mask API publishes 1 API on the APIs.io network. Tagged areas include API Tools, Developer Tools, and Response Filtering.

🌐 Visit website 📡 Source on GitHub
17.7/100 emerging ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreemium
1 APIs
API ToolsDeveloper ToolsResponse Filtering

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 17.7/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 0.0 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.8 / 13
Governance 0.0 / 12
Discoverability 5.0 / 10
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 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 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/mask-api: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

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

Mask API

Mask API is a powerful and flexible tool designed to help programmers and companies customize the response format of endpoint APIs, providing control over which fields are retur...

Pricing Plans 1

Published pricing tiers and plan structures.

Mask Api Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Mask Api Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Mask Api Finops

FINOPS

Security Posture 1

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

Mask Api Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: mask-api
name: Mask API
description: Mask API is a powerful and flexible tool designed to help programmers and companies customize the response format
  of endpoint APIs, enabling selective field filtering and data transformation in API responses.
type: Index
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/mask-api.png
tags:
- API Tools
- Developer Tools
- Response Filtering
url: https://raw.githubusercontent.com/api-evangelist/mask-api/refs/heads/main/apis.yml
created: '2025-02-12'
modified: '2026-04-28'
specificationVersion: '0.19'
apis:
- aid: mask-api:mask-api
  name: Mask API
  description: Mask API is a powerful and flexible tool designed to help programmers and companies customize the response
    format of endpoint APIs, providing control over which fields are returned in API responses.
  humanURL: https://maskapi.dev/docs
  tags:
  - API Tools
  - Developer Tools
  properties:
  - type: Documentation
    url: https://maskapi.dev/docs
common:
- type: DomainSecurity
  url: security/mask-api-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/Mask-API
- type: Website
  url: https://maskapi.dev/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com