Deadsimple Email

Dead Simple Email provides an Email API designed for AI agents, offering programmable inboxes, sending and receiving messages, and real‑time webhooks. It eliminates Gmail suspensions, SMTP complexity, and per‑seat pricing, with plans starting at 100 inboxes for $29 per month. The service targets developers building autonomous agents that need reliable email handling without traditional email infrastructure headaches.

Deadsimple Email publishes 24 API contracts indexed on the APIs.io network, including Aliases API, API Keys API, Auth API, and 21 more. Tagged areas include Email, Artificial Intelligence, Automation, and Communications.

The Deadsimple Email catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 1 Spectral governance ruleset.

Deadsimple Email’s developer surface includes CLI, authentication, API reference, documentation, engineering blog, getting-started guide, pricing, and 25 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

56.9/100 strong Agent 54/100 agent native Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract

Email Artificial Intelligence Automation Communications

Kin Score

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

Composite quality — 56.9/100 · strong

Contract Quality 14.4 / 21

Developer Ergonomics 9.7 / 17

Access Clarity 13.0 / 17

Operational Transparency 2.0 / 11

Contract Governance 2.2 / 10

Discoverability 4.9 / 9

Regulatory Posture 4.8 / 15

Agent readiness — 54/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 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 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 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):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too
Agent Skills +5 pts — skills artifact present, graded by who authored it
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

3 more unmet checks in the Agent Readiness table above.

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

Operational Transparency scores 18.4 — up to +10.6 composite points
Contract Governance scores 22.0 — up to +9.4 composite points
Developer Ergonomics scores 57.1 — up to +8.6 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/deadsimple-email/apis.yml: open an issue on github.com/api-evangelist/deadsimple-email 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 3

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.

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 24

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

Deadsimple Email Aliases API

The Aliases API from Deadsimple Email — 2 operation(s) for aliases.

Deadsimple Email API Keys API

The API Keys API from Deadsimple Email — 2 operation(s) for api keys.

Deadsimple Email Auth API

The Auth API from Deadsimple Email — 10 operation(s) for auth.

Deadsimple Email Calendar API

The Calendar API from Deadsimple Email — 8 operation(s) for calendar.

Deadsimple Email Contacts API

The Contacts API from Deadsimple Email — 2 operation(s) for contacts.

Deadsimple Email Domains API

The Domains API from Deadsimple Email — 6 operation(s) for domains.

Deadsimple Email Drafts API

The Drafts API from Deadsimple Email — 3 operation(s) for drafts.

Deadsimple Email Events API

The Events API from Deadsimple Email — 2 operation(s) for events.

Deadsimple Email Filters API

The Filters API from Deadsimple Email — 4 operation(s) for filters.

Deadsimple Email Guardrails API

The Guardrails API from Deadsimple Email — 1 operation(s) for guardrails.

Deadsimple Email Identity API

The Identity API from Deadsimple Email — 8 operation(s) for identity.

Deadsimple Email Identity Provider API

The Identity Provider API from Deadsimple Email — 7 operation(s) for identity provider.

Deadsimple Email Inboxes API

The Inboxes API from Deadsimple Email — 4 operation(s) for inboxes.

Deadsimple Email Messages API

The Messages API from Deadsimple Email — 13 operation(s) for messages.

Deadsimple Email OAuth API

The OAuth API from Deadsimple Email — 6 operation(s) for oauth.

Deadsimple Email Suppressions API

The Suppressions API from Deadsimple Email — 2 operation(s) for suppressions.

Deadsimple Email System API

The System API from Deadsimple Email — 1 operation(s) for system.

Deadsimple Email Team API

The Team API from Deadsimple Email — 4 operation(s) for team.

Deadsimple Email Templates API

The Templates API from Deadsimple Email — 2 operation(s) for templates.

Deadsimple Email Threads API

The Threads API from Deadsimple Email — 4 operation(s) for threads.

Deadsimple Email Tracking API

The Tracking API from Deadsimple Email — 3 operation(s) for tracking.

Deadsimple Email Usage API

The Usage API from Deadsimple Email — 3 operation(s) for usage.

Deadsimple Email Webhooks API

The Webhooks API from Deadsimple Email — 10 operation(s) for webhooks.

Deadsimple Email Workspaces API

The Workspaces API from Deadsimple Email — 2 operation(s) for workspaces.

Scroll for all 24

Deadsimple Email API pricing

Prices published by Deadsimple Email, read 2026-11-05 from deadsimple.email/compare/pricing.html. A free plan or tier is listed.

Plan	Price
Free tier	Free
Hobby	$5
Pro	$29
Scale	$99

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Deadsimple Email Plans Pricing

4 plans

PLANS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Deadsimple Email Webhooks

ASYNCAPI

Semantic Vocabularies 1

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

Deadsimple Email Context

32 classes · 156 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Deadsimple Email API Rules

60 rules · 45 errors 11 warnings 4 info

SPECTRAL

JSON Schema 6

Standalone JSON Schema definitions for this provider's data models.

CalendarEventInput

13 properties

JSON SCHEMA

CalendarEvent

20 properties

JSON SCHEMA

CalendarInvite

15 properties

JSON SCHEMA

IdentityClaims

11 properties

JSON SCHEMA

IdentityClientRegistration

8 properties

JSON SCHEMA

Webhook

9 properties

JSON SCHEMA

Security Posture 2

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

Deadsimple Email Authentication

2 schemes

SECURITY

Deadsimple Email Domain Security

TLSv1.3 · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Deadsimple Email Scopes

1 scope · authorizationCode

1 scopes

SCOPES

Agentic Access 1

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

Deadsimple Email Agentic Access

149 operations · 82 acting · 7 human-in-the-loop

149 operations · 82 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Login

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

APIReference

APIReference

Documentation

Documentation

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 9

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

Webhooks

DataModel

Idempotency

Conventions

ErrorCatalog

Conformance

Scroll for all 9

Build 3

SDKs, sample code, and the tooling you integrate with

CLI

CLI

SDKs

SDKs

Packages

Packages

Access & Security 4

Authentication, authorization, and security posture

Authentication

OAuthScopes

DomainSecurity

Security

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

PrivacyPolicy

TermsOfService

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: deadsimple-email
name: Deadsimple Email
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://deadsimple.email/og-image.png
description: Dead Simple Email provides an Email API designed for AI agents, offering programmable inboxes, sending and receiving
  messages, and real‑time webhooks. It eliminates Gmail suspensions, SMTP complexity, and per‑seat pricing, with plans starting
  at 100 inboxes for $29 per month. The service targets developers building autonomous agents that need reliable email handling
  without traditional email infrastructure headaches.
url: https://artifacts.apis.io/deadsimple-email/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-05 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-05'
modified: '2026-11-05'
tags:
- Email
- Artificial Intelligence
- Automation
- Communications
tags_raw:
- Email
- API
- AI
- Automation
- Communication
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/deadsimple-email-agentic-access.yml
- type: Plans
  url: plans/deadsimple-email-plans-pricing.yml
- type: Spectral
  url: rules/deadsimple-email-rules.yml
- type: JSONLD
  url: json-ld/deadsimple-email-context.jsonld
- type: Vocabulary
  url: vocabulary/deadsimple-email-vocabulary.yml
- type: Webhooks
  url: asyncapi/deadsimple-email-webhooks.yml
- type: DataModel
  url: data-model/deadsimple-email-data-model.yml
- type: CLI
  url: cli/deadsimple-email-cli.yml
- type: Idempotency
  url: conventions/deadsimple-email-conventions.yml
- type: Conventions
  url: conventions/deadsimple-email-conventions.yml
- type: Authentication
  url: authentication/deadsimple-email-authentication.yml
- type: ErrorCatalog
  url: errors/deadsimple-email-problem-types.yml
- type: Conformance
  url: conformance/deadsimple-email-conformance.yml
- type: LLMsTxt
  url: llms/deadsimple-email-llms.txt
- type: WellKnown
  url: well-known/deadsimple-email-well-known.yml
- type: Hosts
  url: hosts/deadsimple-email-hosts.yml
- type: Vendors
  url: vendors/deadsimple-email-vendors.yml
- type: SDKs
  url: packages/deadsimple-email-packages.yml
- type: Packages
  url: packages/deadsimple-email-packages.yml
- type: OAuthScopes
  url: scopes/deadsimple-email-scopes.yml
- type: DomainSecurity
  url: security/deadsimple-email-domain-security.yml
- type: Website
  url: https://deadsimple.email/
- type: APIReference
  url: https://deadsimple.email/api-reference.html
- type: Documentation
  url: https://deadsimple.email/docs.html
- type: Blog
  url: https://deadsimple.email/blog/getting-started.html
- type: GettingStarted
  url: https://deadsimple.email/blog/getting-started.html
- type: Login
  url: https://app.deadsimple.email/login
- type: Pricing
  url: https://deadsimple.email/compare/pricing.html
- type: PrivacyPolicy
  url: https://deadsimple.email/privacy-policy.html
- type: Security
  url: https://deadsimple.email/security.html
- type: SignUp
  url: https://app.deadsimple.email/signup
- type: TermsOfService
  url: https://deadsimple.email/terms-of-service.html
apis:
- aid: deadsimple-email:deadsimple-email-aliases-api
  name: Deadsimple Email Aliases API
  description: The Aliases API from Deadsimple Email — 2 operation(s) for aliases.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Aliases
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-aliases-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-api-keys-api
  name: Deadsimple Email API Keys API
  description: The API Keys API from Deadsimple Email — 2 operation(s) for api keys.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - APIKeys
  tags_raw:
  - API Keys
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-api-keys-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-auth-api
  name: Deadsimple Email Auth API
  description: The Auth API from Deadsimple Email — 10 operation(s) for auth.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Authentication
  tags_raw:
  - Auth
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-auth-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-calendar-api
  name: Deadsimple Email Calendar API
  description: The Calendar API from Deadsimple Email — 8 operation(s) for calendar.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Calendar
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-calendar-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-contacts-api
  name: Deadsimple Email Contacts API
  description: The Contacts API from Deadsimple Email — 2 operation(s) for contacts.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Contacts
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-contacts-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-domains-api
  name: Deadsimple Email Domains API
  description: The Domains API from Deadsimple Email — 6 operation(s) for domains.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Domains
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-domains-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-drafts-api
  name: Deadsimple Email Drafts API
  description: The Drafts API from Deadsimple Email — 3 operation(s) for drafts.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Drafts
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-drafts-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-events-api
  name: Deadsimple Email Events API
  description: The Events API from Deadsimple Email — 2 operation(s) for events.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Event
  tags_raw:
  - Events
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-events-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-filters-api
  name: Deadsimple Email Filters API
  description: The Filters API from Deadsimple Email — 4 operation(s) for filters.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Filters
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-filters-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-guardrails-api
  name: Deadsimple Email Guardrails API
  description: The Guardrails API from Deadsimple Email — 1 operation(s) for guardrails.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Guardrails
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-guardrails-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-identity-api
  name: Deadsimple Email Identity API
  description: The Identity API from Deadsimple Email — 8 operation(s) for identity.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Identity
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-identity-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-identity-provider-api
  name: Deadsimple Email Identity Provider API
  description: The Identity Provider API from Deadsimple Email — 7 operation(s) for identity provider.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Identity Provider
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-identity-provider-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-inboxes-api
  name: Deadsimple Email Inboxes API
  description: The Inboxes API from Deadsimple Email — 4 operation(s) for inboxes.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Inboxes
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-inboxes-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-messages-api
  name: Deadsimple Email Messages API
  description: The Messages API from Deadsimple Email — 13 operation(s) for messages.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Message
  tags_raw:
  - Messages
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-messages-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-oauth-api
  name: Deadsimple Email OAuth API
  description: The OAuth API from Deadsimple Email — 6 operation(s) for oauth.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - OAuth
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-oauth-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-suppressions-api
  name: Deadsimple Email Suppressions API
  description: The Suppressions API from Deadsimple Email — 2 operation(s) for suppressions.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Suppressions
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-suppressions-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-system-api
  name: Deadsimple Email System API
  description: The System API from Deadsimple Email — 1 operation(s) for system.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - System
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-system-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-team-api
  name: Deadsimple Email Team API
  description: The Team API from Deadsimple Email — 4 operation(s) for team.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Team
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-team-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-templates-api
  name: Deadsimple Email Templates API
  description: The Templates API from Deadsimple Email — 2 operation(s) for templates.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Templates
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-templates-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-threads-api
  name: Deadsimple Email Threads API
  description: The Threads API from Deadsimple Email — 4 operation(s) for threads.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Threads
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-threads-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-tracking-api
  name: Deadsimple Email Tracking API
  description: The Tracking API from Deadsimple Email — 3 operation(s) for tracking.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Tracking
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-tracking-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-usage-api
  name: Deadsimple Email Usage API
  description: The Usage API from Deadsimple Email — 3 operation(s) for usage.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Usage
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-usage-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-webhooks-api
  name: Deadsimple Email Webhooks API
  description: The Webhooks API from Deadsimple Email — 10 operation(s) for webhooks.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-webhooks-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
- aid: deadsimple-email:deadsimple-email-workspaces-api
  name: Deadsimple Email Workspaces API
  description: The Workspaces API from Deadsimple Email — 2 operation(s) for workspaces.
  humanURL: https://deadsimple.email/api-reference.html
  baseURL: https://api.deadsimple.email
  tags:
  - Workspace
  tags_raw:
  - Workspaces
  properties:
  - type: OpenAPI
    url: openapi/deadsimple-email-workspaces-api-openapi.yml
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-invite-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-input-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-claims-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-calendar-event-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-webhook-schema.json
  - type: JSONSchema
    url: json-schema/deadsimple-email-identity-client-registration-schema.json
x-enrichment:
  date: '2026-11-05'
  status: enriched
  artifacts_added: 29
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Deadsimple Email API — frequently asked questions

Does Deadsimple Email have an API?

Yes. APIs.io lists 24 APIs from Deadsimple Email, including Deadsimple Email Aliases API, Deadsimple Email API Keys API and Deadsimple Email Auth API, and 21 more.

Is there an OpenAPI specification for the Deadsimple Email API?

Yes. APIs.io indexes 24 OpenAPI specifications for Deadsimple Email, each linked for download from this page.

How do I authenticate with the Deadsimple Email API?

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

How much does the Deadsimple Email API cost?

Deadsimple Email publishes its prices; its Hobby plan is $5 as of 2026-11-05. APIs.io lists 4 pricing plans for Deadsimple Email, with each plan's price, limits and inclusions under Pricing on this page.

Is the Deadsimple Email API ready for AI agents?

Deadsimple Email has a Kin Score of 56.9 out of 100 (strong) and an Agent Readiness score of 53.5 (agent-native), scored by API Evangelist on 2026-11-06.

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