Inbox Zero

getinboxzero-com is a company surfaced via the API Evangelist harvest backlog (source: mcp-registry) and added to the network as a stub for full-pipeline profiling.

Inbox Zero publishes 3 API contracts indexed on the APIs.io network: Rules API, Senders API, and Stats API. Tagged areas include Email Management, AI Assistant, Email Automation, and Open Source.

The Inbox Zero catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Inbox Zero’s developer surface includes CLI, authentication, support, pricing, changelog, engineering blog, getting-started guide, and 24 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

50.8/100 developing Agent 50/100 agent ready Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessPaidSelf serve

1 published contract 1 Agent Skills

Email Management AI Assistant Email Automation Open Source

Kin Score

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

Composite quality — 50.8/100 · developing

Contract Quality 11.1 / 21

Developer Ergonomics 9.6 / 17

Access Clarity 12.7 / 17

Operational Transparency 2.1 / 11

Contract Governance 2.2 / 10

Discoverability 4.7 / 9

Regulatory Posture 3.5 / 15

Agent readiness — 50/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 8 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 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 AI & Biometrics 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):

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 →
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented) Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks Ask about this →
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too Ask about this →
Agentic Commerce Well-Known Document +5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service, OR (0.27) a live x402 payment challenge from _data/x402-adoption.json — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's Ask about this →

3 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 52.4 — up to +11.9 composite points Ask about this →
Operational Transparency scores 19.0 — up to +10.5 composite points Ask about this →
Contract Governance scores 22.0 — up to +9.4 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/getinboxzero-com/apis.yml: open an issue on github.com/api-evangelist/getinboxzero-com 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 5

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.

Agent2Agent

measured — observed by APIs.io (conformant)

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

APIs 3

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

Inbox Zero Rules API

The Rules API from Inbox Zero — 2 operation(s) for rules.

Inbox Zero Senders API

The Senders API from Inbox Zero — 1 operation(s) for senders.

Inbox Zero Stats API

The Stats API from Inbox Zero — 2 operation(s) for stats.

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

rules-management

AGENT SKILL

Inbox Zero API pricing

Prices published by Inbox Zero, read 2026-11-10 from www.getinboxzero.com/pricing.

Plan	Price
Starter	$20/user/month
Plus	$28/user/month
Professional	$40/user/month

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Inbox Zero Plans Pricing

3 plans

PLANS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Getinboxzero Com Context

1 classes · 1 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Inbox Zero API Rules

50 rules · 48 error-severity 1 warn-severity 1 info-severity

SPECTRAL

Security Posture 3

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

Inbox Zero Authentication

2 schemes

SECURITY

Inbox Zero Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Inbox Zero Trust Center

SOC 2, ISO 27001, PCI DSS, GDPR

SECURITY

Agentic Access (API Evangelist recommendations) 1

Recommended x-agentic-access execution contracts for AI agents.

Inbox Zero Agentic Access

8 operations · 4 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

CLI

CLI

GitHubOrganization

GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

Compliance

Authentication

TrustCenter

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

ChangeLog

ChangeLog

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: getinboxzero-com
name: Inbox Zero
accessModel:
  pricing: paid
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Paid · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://www.getinboxzero.com/opengraph-image.jpg?opengraph-image.2_3tl_gj8wvk_.jpg
description: 'getinboxzero-com is a company surfaced via the API Evangelist harvest backlog (source: mcp-registry) and added
  to the network as a stub for full-pipeline profiling.'
url: https://www.getinboxzero.como-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-10 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-09'
modified: '2026-11-09'
tags:
- Email Management
- AI Assistant
- Email Automation
- Open Source
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/getinboxzero-com-agentic-access.yml
- type: Plans
  url: plans/getinboxzero-com-plans-pricing.yml
- type: Spectral
  url: rules/getinboxzero-com-rules.yml
- type: JSONLD
  url: json-ld/getinboxzero-com-context.jsonld
- type: Vocabulary
  url: vocabulary/getinboxzero-com-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/getinboxzero-com-data-model.yml
- type: CLI
  url: cli/getinboxzero-com-cli.yml
- type: Compliance
  url: https://security.getinboxzero.com/
- type: Authentication
  url: authentication/getinboxzero-com-authentication.yml
- type: ErrorCatalog
  url: errors/getinboxzero-com-problem-types.yml
- type: Conformance
  url: conformance/getinboxzero-com-conformance.yml
- type: LLMsTxt
  url: llms/getinboxzero-com-llms.txt
- type: AgentCard
  url: a2a/getinboxzero-com-a2a.yml
- type: WellKnown
  url: well-known/getinboxzero-com-well-known.yml
- type: Hosts
  url: hosts/getinboxzero-com-hosts.yml
- type: Vendors
  url: vendors/getinboxzero-com-vendors.yml
- type: TermsOfService
  url: https://www.getinboxzero.com/terms
- type: Support
  url: https://www.getinboxzero.com/support
- type: PrivacyPolicy
  url: https://www.getinboxzero.com/privacy
- type: Pricing
  url: https://www.getinboxzero.com/pricing
- type: Login
  url: https://www.getinboxzero.com/login
- type: GitHubOrganization
  url: https://github.com/trust-center
- type: ChangeLog
  url: https://www.getinboxzero.com/changelog
- type: Blog
  url: https://www.getinboxzero.com/blog
- type: GettingStarted
  url: https://docs.getinboxzero.com/essentials/getting-started
- type: Documentation
  url: https://docs.getinboxzero.com/
- type: APIReference
  url: https://docs.getinboxzero.com/llms.txt
- type: TrustCenter
  url: security/getinboxzero-com-trust-center.yml
- type: DomainSecurity
  url: security/getinboxzero-com-domain-security.yml
- type: Website
  url: https://getinboxzero.com/
apis:
- aid: getinboxzero-com:getinboxzero-com-rules-api
  name: Inbox Zero Rules API
  description: The Rules API from Inbox Zero — 2 operation(s) for rules.
  humanURL: https://docs.getinboxzero.com/api-reference/introduction
  baseURL: https://www.getinboxzero.com/api/v1
  tags:
  - Rules
  properties:
  - type: OpenAPI
    url: openapi/getinboxzero-com-rules-api-openapi.yml
- aid: getinboxzero-com:getinboxzero-com-senders-api
  name: Inbox Zero Senders API
  description: The Senders API from Inbox Zero — 1 operation(s) for senders.
  humanURL: https://docs.getinboxzero.com/api-reference/introduction
  baseURL: https://www.getinboxzero.com/api/v1
  tags:
  - Senders
  properties:
  - type: OpenAPI
    url: openapi/getinboxzero-com-senders-api-openapi.yml
- aid: getinboxzero-com:getinboxzero-com-stats-api
  name: Inbox Zero Stats API
  description: The Stats API from Inbox Zero — 2 operation(s) for stats.
  humanURL: https://docs.getinboxzero.com/api-reference/introduction
  baseURL: https://www.getinboxzero.com/api/v1
  tags:
  - Stats
  properties:
  - type: OpenAPI
    url: openapi/getinboxzero-com-stats-api-openapi.yml
x-enrichment:
  date: '2026-11-10'
  status: enriched
  artifacts_added: 32
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Inbox Zero API — frequently asked questions

Does Inbox Zero have an API?

Yes. APIs.io lists 3 APIs from Inbox Zero, including Inbox Zero Rules API, Inbox Zero Senders API and Inbox Zero Stats API.

Is there an OpenAPI specification for the Inbox Zero API?

Yes. APIs.io indexes 3 OpenAPI specifications for Inbox Zero, each linked for download from this page.

How do I authenticate with the Inbox Zero API?

Inbox Zero documents its authentication (2 schemes). The details are profiled on APIs.io as Inbox Zero Authentication.

How much does the Inbox Zero API cost?

Inbox Zero publishes its prices; its Starter plan is $20/user/month as of 2026-11-10. APIs.io lists 3 pricing plans for Inbox Zero, with each plan's price, limits and inclusions under Pricing on this page.

Is the Inbox Zero API ready for AI agents?

Inbox Zero has a Kin Score of 50.8 out of 100 (developing) and an Agent Readiness score of 50.0 (agent-ready), scored by API Evangelist on 2026-11-13.

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