AgentAddress

AgentAddress provides a return address service for AI agents, offering a write‑only HTTPS inbox and inbound email address that feed a private, ordered queue. It enables agents to receive webhooks, callbacks, and human replies without running their own server, supporting event queues, read tokens, and secure message handling.

AgentAddress is listed with 1 API on the APIs.io network. Tagged areas include Company, Artificial Intelligence, Webhook, Email, and Agents.

AgentAddress’ developer surface includes documentation, pricing, and 10 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

15.8/100 emerging ▼ -5.1 Agent 4/100 human only Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemium

1 API

Company Artificial Intelligence Webhook Email Agents

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 15.8/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 0.8 / 17

Access Clarity 6.3 / 17

Operational Transparency 0.4 / 11

Contract Governance 0.5 / 10

Discoverability 5.6 / 9

Regulatory Posture 2.0 / 15

Agent readiness — 4/100 · 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 6 / 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
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes

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 4.8 — up to +19.0 composite points
Access Clarity scores 36.8 — up to +12.6 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/agentaddress-dev/apis.yml: open an issue on github.com/api-evangelist/agentaddress-dev 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.

AgentAddress API

Provision a persistent return address for an ephemeral AI agent.

AgentAddress API pricing

Prices published by AgentAddress, read 2026-10-31 from agentaddress.dev/pricing.

Plan	Price
Free	$0 while we build
Planned Paid	$17/month

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Agentaddress Dev Plans Pricing

2 plans

PLANS

Security Posture 1

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

Agentaddress Dev Domain Security

TLSv1.3 · DNSSEC · 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

LLMsTxt

LLMsTxt

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Webhooks

Webhooks

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

PrivacyPolicy

TermsOfService

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: agentaddress-dev
name: AgentAddress
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
image: https://agentaddress.dev/opengraph-image?9437a4080f6b5df1
description: AgentAddress provides a return address service for AI agents, offering a write‑only HTTPS inbox and inbound email
  address that feed a private, ordered queue. It enables agents to receive webhooks, callbacks, and human replies without
  running their own server, supporting event queues, read tokens, and secure message handling.
url: https://artifacts.apis.io/agentaddress-dev/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-31 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-31'
modified: '2026-10-31'
tags:
- Company
- Artificial Intelligence
- Webhook
- Email
- Agents
tags_raw:
- Company
- AI
- Webhooks
- Email
- Agent
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/agentaddress-dev-plans-pricing.yml
- type: Conformance
  url: conformance/agentaddress-dev-conformance.yml
- type: LLMsTxt
  url: llms/agentaddress-dev-llms.txt
- type: Hosts
  url: hosts/agentaddress-dev-hosts.yml
- type: Vendors
  url: vendors/agentaddress-dev-vendors.yml
- type: Webhooks
  url: https://agentaddress.dev/webhooks
- type: DomainSecurity
  url: security/agentaddress-dev-domain-security.yml
- type: Website
  url: https://agentaddress.dev/
- type: Documentation
  url: https://agentaddress.dev/docs
- type: Pricing
  url: https://agentaddress.dev/pricing
- type: PrivacyPolicy
  url: https://agentaddress.dev/privacy
- type: TermsOfService
  url: https://agentaddress.dev/terms
apis:
- name: AgentAddress API
  description: Provision a persistent return address for an ephemeral AI agent.
  humanURL: https://agentaddress.dev/docs
  baseURL: https://agentaddress.dev
  aid: agentaddress-dev:agentaddress-api
x-enrichment:
  date: '2026-10-31'
  status: enriched
  artifacts_added: 13
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

AgentAddress API — frequently asked questions

Does AgentAddress have an API?

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

How much does the AgentAddress API cost?

AgentAddress publishes its prices; its Free plan is $0 while we build as of 2026-10-31. APIs.io lists 2 pricing plans for AgentAddress, with each plan's price, limits and inclusions under Pricing on this page.

Is the AgentAddress API ready for AI agents?

AgentAddress has a Kin Score of 15.8 out of 100 (emerging) and an Agent Readiness score of 3.9 (human-only), scored by API Evangelist on 2026-11-06.

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