OwlRelay

OwlRelay provides an open-source solution that converts incoming emails into HTTP requests, enabling developers to trigger webhooks and integrate email-driven workflows. Users can create unique email addresses that forward messages, including attachments, to specified endpoints, facilitating automation with services like Zapier, n8n, and custom APIs. The platform offers a self-hosted option and a hosted SaaS, focusing on simplicity, privacy, and extensibility for developers building email-triggered integrations.

OwlRelay is listed with 1 API on the APIs.io network. Tagged areas include Company, Email, Webhooks, Open-Source, and Automation.

OwlRelay’s developer surface includes documentation, pricing, and 12 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

19.0/100 emerging Agent 3/100 human only Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API

Company EmailWebhooksOpen-SourceAutomation

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 19.0/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 2.4 / 17

Access Clarity 5.4 / 17

Operational Transparency 1.2 / 11

Contract Governance 1.9 / 10

Discoverability 4.9 / 9

Regulatory Posture 2.8 / 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 0 / 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 4 / 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

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
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
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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

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
Developer Ergonomics scores 14.3 — up to +17.1 composite points
Access Clarity scores 31.6 — up to +13.7 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/owlrelay/apis.yml: open an issue on github.com/api-evangelist/owlrelay 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 →

APIs 1

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

OwlRelay API

OwlRelay provides an email-to-HTTP service with webhook integration, allowing developers to trigger webhooks via generated email addresses.

Security Posture 1

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

Owlrelay Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Access & Security 2

Authentication, authorization, and security posture

SecurityTxt

SecurityTxt

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

Community

Community

Community

Community

Community

Community

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: owlrelay
name: OwlRelay
image: https://owlrelay.email/og-image.png
description: OwlRelay provides an open-source solution that converts incoming emails into HTTP requests, enabling developers
  to trigger webhooks and integrate email-driven workflows. Users can create unique email addresses that forward messages,
  including attachments, to specified endpoints, facilitating automation with services like Zapier, n8n, and custom APIs.
  The platform offers a self-hosted option and a hosted SaaS, focusing on simplicity, privacy, and extensibility for developers
  building email-triggered integrations.
url: https://raw.githubusercontent.com/api-evangelist/owlrelay/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-27 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-27'
modified: '2026-10-27'
tags:
- Company
- Email
- Webhooks
- Open-Source
- Automation
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Conformance
  url: conformance/owlrelay-conformance.yml
- type: SecurityTxt
  url: well-known/owlrelay-bsky-security.txt
- type: WellKnown
  url: well-known/owlrelay-well-known.yml
- type: Hosts
  url: hosts/owlrelay-hosts.yml
- type: Vendors
  url: vendors/owlrelay-vendors.yml
- type: DomainSecurity
  url: security/owlrelay-domain-security.yml
- type: Website
  url: https://owlrelay.email/
- type: Documentation
  url: https://owlrelay.email/
- type: Pricing
  url: https://owlrelay.email/#pricing
- type: TermsOfService
  url: https://owlrelay.email/terms-of-service
- type: PrivacyPolicy
  url: https://owlrelay.email/privacy
- type: Community
  url: https://github.com/papra-hq/owlrelay
- type: Community
  url: https://discord.gg/8UPjzsrBNF
- type: Community
  url: https://bsky.app/profile/owlrelay.email
apis:
- name: OwlRelay API
  description: OwlRelay provides an email-to-HTTP service with webhook integration, allowing developers to trigger webhooks
    via generated email addresses.
  humanURL: https://owlrelay.email/
  aid: owlrelay:owlrelay-api
x-submission-probe: 200 2026-10-26
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: Documentation site is a JavaScript-rendered SPA, no machine‑readable OpenAPI spec found.
  evidence:
  - url: https://owlrelay.email/
    status: 200
  checked: '2026-10-27'
x-enrichment:
  date: '2026-10-27'
  status: enriched
  artifacts_added: 8
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

OwlRelay API — frequently asked questions

Does OwlRelay have an API?

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

Is the OwlRelay API ready for AI agents?

OwlRelay has a Kin Score of 19.0 out of 100 (emerging) and an Agent Readiness score of 2.9 (human-only), scored by API Evangelist on 2026-10-31.

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