Metlo

Metlo provides an API security platform that automatically discovers, monitors, and protects APIs in real time. It offers developers and security teams visibility into API traffic, detects anomalies, and enforces policies without requiring code changes. Metlo’s solution integrates with CI/CD pipelines, supports OpenAPI specifications, and provides detailed dashboards and alerts to help organizations secure their API surface. The company focuses on simplifying API security for modern cloud-native environments, enabling rapid detection of threats and compliance with industry standards. Metlo also offers a free tier and enterprise plans, extensive documentation, and SDKs for multiple languages.

Metlo is listed with 1 API on the APIs.io network. Tagged areas include API Security, Cloud-Native, Real-Time Monitoring, OpenAPI, and CI/CD Integration.

Metlo’s developer surface includes CLI, sandbox, authentication, documentation, getting-started guide, signup flow, and 16 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

25.6/100 emerging ▲ 6.4 Agent 3/100 human only Heartbeat 0/100 dormant Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

1 API

API Security Cloud-Native Real-Time Monitoring OpenAPI CI/CD Integration

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 25.6/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 10.9 / 17

Access Clarity 5.1 / 17

Operational Transparency 0.5 / 11

Contract Governance 0.0 / 10

Discoverability 5.9 / 9

Regulatory Posture 1.5 / 15

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 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 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 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

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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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document Ask about this →
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
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) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →

12 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points Ask about this →
Access Clarity scores 29.8 — up to +14.0 composite points Ask about this →
Operational Transparency scores 4.8 — up to +12.4 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/metlo/apis.yml: open an issue on github.com/api-evangelist/metlo 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 →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 1

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

Metlo API

Metlo API provides API security capabilities as documented.

Terms of Service 1

What its API terms permit and prohibit, quoted from its own page.

Metlo

9 quoted statements, read from Metlo's own page on 2026-11-10.

TERMS

Eligibility 1

Who may sign up and where, quoted from its own terms.

Metlo

2 quoted statements, read from Metlo's own page on 2026-11-10.

ELIGIBILITY

AI Preferences 1

Its stance on AI training, inference and agents, quoted from its own pages.

Metlo

1 quoted statement, read from Metlo's own page on 2026-11-10.

AI PREFS

Data License 1

How its data and outputs may be reused, quoted from its own terms.

Metlo

1 quoted statement, read from Metlo's own page on 2026-11-10.

LICENSE

Security Posture 2

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

Metlo Authentication

4 schemes

SECURITY

Metlo Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

Sandbox

DeveloperPortal

GettingStarted

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

AIPreferences

AIPreferences

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Build 4

SDKs, sample code, and the tooling you integrate with

CLI

CLI

SDKs

SDKs

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

UsageTerms

UsageTerms

DataLicense

DataLicense

Company 1

The organization behind the API

Website

Website

Other 4

Properties that don't map to a standard resource type

AgentCard

Hosts

Vendors

Eligibility

Source (apis.yml)

aid: metlo
name: Metlo
description: Metlo provides an API security platform that automatically discovers, monitors, and protects APIs in real time.
  It offers developers and security teams visibility into API traffic, detects anomalies, and enforces policies without requiring
  code changes. Metlo’s solution integrates with CI/CD pipelines, supports OpenAPI specifications, and provides detailed dashboards
  and alerts to help organizations secure their API surface. The company focuses on simplifying API security for modern cloud-native
  environments, enabling rapid detection of threats and compliance with industry standards. Metlo also offers a free tier
  and enterprise plans, extensive documentation, and SDKs for multiple languages.
url: https://raw.githubusercontent.com/api-evangelist/metlo/refs/heads/main/apis.yml
x-type: company
x-source: harvest:g2-catalog
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-21 (modular-v1; was harvest)
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: unreadable
  source:
  - authentication
  - security
  - sandbox
  generated: '2026-11-13'
  method: derived
specificationVersion: '0.20'
created: '2026-10-20'
modified: '2026-10-20'
tags:
- API Security
- Cloud-Native
- Real-Time Monitoring
- OpenAPI
- CI/CD Integration
tags_raw:
- API Security
- Cloud Native
- Real-time Monitoring
- OpenAPI
- CI/CD Integration
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: CLI
  url: cli/metlo-cli.yml
- type: Sandbox
  url: sandbox/metlo-sandbox.yml
- type: Authentication
  url: authentication/metlo-authentication.yml
- type: LLMsTxt
  url: llms/metlo-llms.txt
- type: AgentCard
  url: a2a/metlo-a2a.yml
- type: WellKnown
  url: well-known/metlo-well-known.yml
- type: Hosts
  url: hosts/metlo-hosts.yml
- type: Vendors
  url: vendors/metlo-vendors.yml
- type: SDKs
  url: packages/metlo-packages.yml
- type: Packages
  url: packages/metlo-packages.yml
- type: DomainSecurity
  url: security/metlo-domain-security.yml
- type: Website
  url: https://metlo.com/
- type: DeveloperPortal
  url: https://docs.metlo.com/
- type: Documentation
  url: https://docs.metlo.com/
- type: GettingStarted
  url: https://docs.metlo.com/intro/getting-started.md
- type: GitHubOrganization
  url: https://github.com/metlo-labs
- type: SignUp
  url: https://app.metlo.com/signup
- type: TermsOfService
  url: https://www.metlo.com/terms
- type: UsageTerms
  url: terms/metlo-terms-of-service.yml
- type: Eligibility
  url: eligibility/metlo-eligibility.yml
- type: AIPreferences
  url: ai-preferences/metlo-ai-preferences.yml
- type: DataLicense
  url: data-license/metlo-data-license.yml
apis:
- name: Metlo API
  description: Metlo API provides API security capabilities as documented.
  humanURL: https://docs.metlo.com/intro/welcome
  baseURL: https://api.metlo.com
  aid: metlo:metlo-api
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: No OpenAPI, AsyncAPI, GraphQL, or other machine-readable contract was found on the provider's hosts.
  evidence:
  - url: https://api.metlo.com/openapi.json
    status: 0
  checked: '2026-10-20'
x-enrichment:
  date: '2026-10-21'
  status: enriched
  artifacts_added: 20
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Metlo API — frequently asked questions

Does Metlo have an API?

Yes. APIs.io lists 1 API from Metlo, including Metlo API.

How do I authenticate with the Metlo API?

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

Is the Metlo API ready for AI agents?

Metlo has a Kin Score of 25.6 out of 100 (emerging) and an Agent Readiness score of 2.5 (human-only), scored by API Evangelist on 2026-11-13.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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How their score was established

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