groundmail-dev

Groundmail provides a transactional email API and SMTP service designed for developers to send password resets, receipts, alerts, and other automated messages. The platform separates transactional mail from marketing campaigns, offering dedicated IPs, automation features, and a free tier of 3,000 emails per month. It aims to simplify email integration for applications while ensuring deliverability and compliance.

groundmail-dev publishes 18 API contracts indexed on the APIs.io network, including Automations API, Deliverability API, Dmarc API, and 15 more. Tagged areas include Email, API, Transactional, SMTP, and Developer.

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

groundmail-dev’s developer surface includes CLI, authentication, support, pricing, changelog, engineering blog, getting-started guide, and 29 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

66.6/100 exemplar Agent 64/100 agent native Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 published contract 5 Agent Skills

EmailAPITransactional SMTPDeveloper

Kin Score

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

Composite quality — 66.6/100 · exemplar

Contract Quality 14.1 / 21

Developer Ergonomics 12.0 / 17

Access Clarity 8.6 / 17

Operational Transparency 6.1 / 11

Contract Governance 8.1 / 10

Discoverability 5.8 / 9

Regulatory Posture 4.6 / 15

Agent readiness — 64/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 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 0 / 5

Registration Without a Human 6 / 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):

A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too
Agentic Commerce Well-Known Document +5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's
Protected Resource Metadata +5 pts — a served /.well-known/oauth-protected-resource carrying `resource` (documented), and naming its authorization_servers (verified)
Dry-Run / Simulate Mode +4 pts — OpenAPI: destructive operations expose a dry_run / simulate / preview / validate_only parameter
Well-Known Catalog +4 pts — common[].type includes WellKnown, APICatalog, or api-catalog

1 more unmet check in the Agent Readiness table above.

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

Access Clarity scores 50.5 — up to +9.9 composite points
Contract Quality scores 66.5 — up to +8.4 composite points
Developer Ergonomics scores 70.7 — up to +5.9 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/groundmail-dev/apis.yml: open an issue on github.com/api-evangelist/groundmail-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 18

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

groundmail-dev Automations API

Create and manage event-driven transactional automations

groundmail-dev Deliverability API

Best-effort metrics computed from stored email events

groundmail-dev Dmarc API

DMARC monitoring per domain (aggregate reports, sending sources, enforcement readiness)

groundmail-dev Domains API

The Domains API from groundmail-dev — 2 operation(s) for domains.

groundmail-dev Emails API

The Emails API from groundmail-dev — 5 operation(s) for emails.

groundmail-dev Events API

Custom events that trigger transactional automations

groundmail-dev Inbound API

Receive domains, inbound ingestion, and received email retrieval

groundmail-dev Integrations API

The Integrations API from groundmail-dev — 3 operation(s) for integrations.

groundmail-dev Migrations API

Beta. Import templates, suppressions, sending domains and webhooks from SendGrid, Postmark, Mailgun, Resend or Amazon SES. The provider key (Amazon SES: access key and secret) i...

groundmail-dev OAuth API

OAuth 2.0 Device Authorization Grant (RFC 8628) for the CLI and agents, the authorization code grant with PKCE for the hosted MCP server, dynamic client registration (RFC 7591),...

groundmail-dev Smtp Credentials API

The SmtpCredentials API from groundmail-dev — 2 operation(s) for smtpcredentials.

groundmail-dev Suppressions API

Account-level recipient suppressions (bounce/complaint/manual)

groundmail-dev Templates API

Email templates with `{{variable}}` interpolation

groundmail-dev Tenants API

Your own customers inside one Groundmail account, each with its own domains, suppression list, stats, sending ramp and pause switch. Included on Scale and Dedicated.

groundmail-dev Test inbox API

A test domain per team. Mail sent to it from any email provider is caught and never delivered, so tests can wait for an email and read its code and links.

groundmail-dev Validation API

Groundmail validation — check an address before you accept or send to it

groundmail-dev Webhooks API

The Webhooks API from groundmail-dev — 2 operation(s) for webhooks.

groundmail-dev API Keys API

Manage API keys (list, create, revoke)

Scroll for all 18

Agent Skills 5

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

groundmail-dev-create-and-activate-automation

AGENT SKILL

groundmail-dev-create-and-test-template

AGENT SKILL

groundmail-dev-manage-tenant-domain

AGENT SKILL

groundmail-dev-manage-webhooks

AGENT SKILL

groundmail-dev-send-transactional-email

AGENT SKILL

Pricing Plans 1

Published pricing tiers and plan structures.

Groundmail Dev Plans Pricing

2 plans

PLANS

Event Specifications 1

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

Groundmail Dev Webhooks

ASYNCAPI

Semantic Vocabularies 1

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

Groundmail Dev Context

120 classes · 335 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

groundmail-dev API Rules

15 rules · 10 errors 2 warnings 3 info

SPECTRAL

JSON Schema 6

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

CreateMigrationRequest

11 properties

JSON SCHEMA

Domain

16 properties

JSON SCHEMA

EmailListItem

25 properties

JSON SCHEMA

EmailWebhookEventPayload

3 properties

JSON SCHEMA

RemoteApplyDnsCredentials

17 properties

JSON SCHEMA

SendEmailRequest

24 properties

JSON SCHEMA

Security Posture 3

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

Groundmail Dev Authentication

4 schemes

SECURITY

Groundmail Dev Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Groundmail Dev Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

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

Groundmail Dev Agentic Access

91 operations · 54 acting · 4 human-in-the-loop

91 operations · 54 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

DeveloperPortal

DeveloperPortal

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 9

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

Webhooks

DataModel

Idempotency

Conventions

ErrorCatalog

Conformance

Scroll for all 9

Build 2

SDKs, sample code, and the tooling you integrate with

CLI

CLI

GitHubOrganization

GitHubOrganization

Access & Security 5

Authentication, authorization, and security posture

Security

Security

Authentication

Authentication

SecurityTxt

SecurityTxt

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

ChangeLog

ChangeLog

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

Company 3

The organization behind the API

Newsroom

Newsroom

Blog

Blog

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: groundmail-dev
name: groundmail-dev
image: https://groundmail.dev/opengraph-image
description: Groundmail provides a transactional email API and SMTP service designed for developers to send password resets,
  receipts, alerts, and other automated messages. The platform separates transactional mail from marketing campaigns, offering
  dedicated IPs, automation features, and a free tier of 3,000 emails per month. It aims to simplify email integration for
  applications while ensuring deliverability and compliance.
url: https://artifacts.apis.io/groundmail-dev/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-30 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-30'
modified: '2026-10-30'
tags:
- Email
- API
- Transactional
- SMTP
- Developer
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/groundmail-dev-agentic-access.yml
- type: Plans
  url: plans/groundmail-dev-plans-pricing.yml
- type: Spectral
  url: rules/groundmail-dev-rules.yml
- type: JSONLD
  url: json-ld/groundmail-dev-context.jsonld
- type: Vocabulary
  url: vocabulary/groundmail-dev-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Webhooks
  url: asyncapi/groundmail-dev-webhooks.yml
- type: DataModel
  url: data-model/groundmail-dev-data-model.yml
- type: CLI
  url: cli/groundmail-dev-cli.yml
- type: Idempotency
  url: conventions/groundmail-dev-conventions.yml
- type: Conventions
  url: conventions/groundmail-dev-conventions.yml
- type: Security
  url: security/groundmail-dev-vulnerability-disclosure.yml
- type: Authentication
  url: authentication/groundmail-dev-authentication.yml
- type: ErrorCatalog
  url: errors/groundmail-dev-problem-types.yml
- type: Conformance
  url: conformance/groundmail-dev-conformance.yml
- type: LLMsTxt
  url: llms/groundmail-dev-llms.txt
- type: SecurityTxt
  url: well-known/groundmail-dev-security.txt
- type: WellKnown
  url: well-known/groundmail-dev-well-known.yml
- type: Hosts
  url: hosts/groundmail-dev-hosts.yml
- type: Vendors
  url: vendors/groundmail-dev-vendors.yml
- type: TermsOfService
  url: https://groundmail.dev/legal/terms/
- type: Support
  url: https://groundmail.dev/support/
- type: StatusPage
  url: https://status.groundmail.dev
- type: PrivacyPolicy
  url: https://groundmail.dev/legal/privacy/
- type: Pricing
  url: https://groundmail.dev/pricing/
- type: Newsroom
  url: https://groundmail.dev/press/
- type: GitHubOrganization
  url: https://github.com/Groundmail
- type: ChangeLog
  url: https://groundmail.dev/changelog/
- type: Blog
  url: https://groundmail.dev/blog/
- type: GettingStarted
  url: https://docs.groundmail.dev/quickstart
- type: Documentation
  url: https://docs.groundmail.dev/
- type: DeveloperPortal
  url: https://api.groundmail.dev.\n-
- type: APIReference
  url: https://docs.groundmail.dev/api-explorer
- type: VulnerabilityDisclosure
  url: security/groundmail-dev-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/groundmail-dev-domain-security.yml
- type: Website
  url: https://groundmail.dev/
apis:
- aid: groundmail-dev:groundmail-dev-automations-api
  name: groundmail-dev Automations API
  description: Create and manage event-driven transactional automations
  humanURL: https://docs.groundmail.dev/api-explorer
  baseURL: https://api.groundmail.dev
  tags:
  - Automations
  properties:
  - type: OpenAPI
    url: openapi/groundmail-dev-automations-api-openapi.yml
  - type: JSONSchema
    url: json-schema/groundmail-dev-send-email-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-list-item-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-webhook-event-payload-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-domain-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-create-migration-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-remote-apply-dns-credentials-schema.json
- aid: groundmail-dev:groundmail-dev-deliverability-api
  name: groundmail-dev Deliverability API
  description: Best-effort metrics computed from stored email events
  humanURL: https://docs.groundmail.dev/api-explorer
  baseURL: https://api.groundmail.dev
  tags:
  - Deliverability
  properties:
  - type: OpenAPI
    url: openapi/groundmail-dev-deliverability-api-openapi.yml
  - type: JSONSchema
    url: json-schema/groundmail-dev-send-email-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-list-item-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-webhook-event-payload-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-domain-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-create-migration-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-remote-apply-dns-credentials-schema.json
- aid: groundmail-dev:groundmail-dev-dmarc-api
  name: groundmail-dev Dmarc API
  description: DMARC monitoring per domain (aggregate reports, sending sources, enforcement readiness)
  humanURL: https://docs.groundmail.dev/api-explorer
  baseURL: https://api.groundmail.dev
  tags:
  - Dmarc
  properties:
  - type: OpenAPI
    url: openapi/groundmail-dev-dmarc-api-openapi.yml
  - type: JSONSchema
    url: json-schema/groundmail-dev-send-email-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-list-item-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-webhook-event-payload-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-domain-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-create-migration-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-remote-apply-dns-credentials-schema.json
- aid: groundmail-dev:groundmail-dev-domains-api
  name: groundmail-dev Domains API
  description: The Domains API from groundmail-dev — 2 operation(s) for domains.
  humanURL: https://docs.groundmail.dev/api-explorer
  baseURL: https://api.groundmail.dev
  tags:
  - Domains
  properties:
  - type: OpenAPI
    url: openapi/groundmail-dev-domains-api-openapi.yml
  - type: JSONSchema
    url: json-schema/groundmail-dev-send-email-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-list-item-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-webhook-event-payload-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-domain-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-create-migration-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-remote-apply-dns-credentials-schema.json
- aid: groundmail-dev:groundmail-dev-emails-api
  name: groundmail-dev Emails API
  description: The Emails API from groundmail-dev — 5 operation(s) for emails.
  humanURL: https://docs.groundmail.dev/api-explorer
  baseURL: https://api.groundmail.dev
  tags:
  - Emails
  properties:
  - type: OpenAPI
    url: openapi/groundmail-dev-emails-api-openapi.yml
  - type: JSONSchema
    url: json-schema/groundmail-dev-send-email-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-list-item-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-webhook-event-payload-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-domain-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-create-migration-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-remote-apply-dns-credentials-schema.json
- aid: groundmail-dev:groundmail-dev-events-api
  name: groundmail-dev Events API
  description: Custom events that trigger transactional automations
  humanURL: https://docs.groundmail.dev/api-explorer
  baseURL: https://api.groundmail.dev
  tags:
  - Events
  properties:
  - type: OpenAPI
    url: openapi/groundmail-dev-events-api-openapi.yml
  - type: JSONSchema
    url: json-schema/groundmail-dev-send-email-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-list-item-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-webhook-event-payload-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-domain-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-create-migration-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-remote-apply-dns-credentials-schema.json
- aid: groundmail-dev:groundmail-dev-inbound-api
  name: groundmail-dev Inbound API
  description: Receive domains, inbound ingestion, and received email retrieval
  humanURL: https://docs.groundmail.dev/api-explorer
  baseURL: https://api.groundmail.dev
  tags:
  - Inbound
  properties:
  - type: OpenAPI
    url: openapi/groundmail-dev-inbound-api-openapi.yml
  - type: JSONSchema
    url: json-schema/groundmail-dev-send-email-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-list-item-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-webhook-event-payload-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-domain-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-create-migration-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-remote-apply-dns-credentials-schema.json
- aid: groundmail-dev:groundmail-dev-integrations-api
  name: groundmail-dev Integrations API
  description: The Integrations API from groundmail-dev — 3 operation(s) for integrations.
  humanURL: https://docs.groundmail.dev/api-explorer
  baseURL: https://api.groundmail.dev
  tags:
  - Integrations
  properties:
  - type: OpenAPI
    url: openapi/groundmail-dev-integrations-api-openapi.yml
  - type: JSONSchema
    url: json-schema/groundmail-dev-send-email-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-list-item-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-webhook-event-payload-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-domain-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-create-migration-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-remote-apply-dns-credentials-schema.json
- aid: groundmail-dev:groundmail-dev-migrations-api
  name: groundmail-dev Migrations API
  description: 'Beta. Import templates, suppressions, sending domains and webhooks from SendGrid, Postmark, Mailgun, Resend
    or Amazon SES. The provider key (Amazon SES: access key and secret) is used for the request only and never stored.'
  humanURL: https://docs.groundmail.dev/api-explorer
  baseURL: https://api.groundmail.dev
  tags:
  - Migrations
  properties:
  - type: OpenAPI
    url: openapi/groundmail-dev-migrations-api-openapi.yml
  - type: JSONSchema
    url: json-schema/groundmail-dev-send-email-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-list-item-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-webhook-event-payload-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-domain-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-create-migration-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-remote-apply-dns-credentials-schema.json
- aid: groundmail-dev:groundmail-dev-oauth-api
  name: groundmail-dev OAuth API
  description: 'OAuth 2.0 Device Authorization Grant (RFC 8628) for the CLI and agents, the authorization code grant with
    PKCE for the hosted MCP server, dynamic client registration (RFC 7591), token refresh with rotating refresh tokens, revocation
    (RFC 7009), and a UserInfo endpoint for the `openid` and `email` scopes. These endpoints send CORS headers and answer
    OPTIONS preflights. Server metadata: https://app.groundmail.dev/.well-known/oauth-authorization-server'
  humanURL: https://docs.groundmail.dev/api-explorer
  baseURL: https://api.groundmail.dev
  tags:
  - OAuth
  properties:
  - type: OpenAPI
    url: openapi/groundmail-dev-oauth-api-openapi.yml
  - type: JSONSchema
    url: json-schema/groundmail-dev-send-email-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-list-item-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-webhook-event-payload-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-domain-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-create-migration-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-remote-apply-dns-credentials-schema.json
- aid: groundmail-dev:groundmail-dev-smtpcredentials-api
  name: groundmail-dev Smtp Credentials API
  description: The SmtpCredentials API from groundmail-dev — 2 operation(s) for smtpcredentials.
  humanURL: https://docs.groundmail.dev/api-explorer
  baseURL: https://api.groundmail.dev
  tags:
  - SmtpCredentials
  properties:
  - type: OpenAPI
    url: openapi/groundmail-dev-smtpcredentials-api-openapi.yml
  - type: JSONSchema
    url: json-schema/groundmail-dev-send-email-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-list-item-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-webhook-event-payload-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-domain-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-create-migration-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-remote-apply-dns-credentials-schema.json
- aid: groundmail-dev:groundmail-dev-suppressions-api
  name: groundmail-dev Suppressions API
  description: Account-level recipient suppressions (bounce/complaint/manual)
  humanURL: https://docs.groundmail.dev/api-explorer
  baseURL: https://api.groundmail.dev
  tags:
  - Suppressions
  properties:
  - type: OpenAPI
    url: openapi/groundmail-dev-suppressions-api-openapi.yml
  - type: JSONSchema
    url: json-schema/groundmail-dev-send-email-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-list-item-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-webhook-event-payload-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-domain-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-create-migration-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-remote-apply-dns-credentials-schema.json
- aid: groundmail-dev:groundmail-dev-templates-api
  name: groundmail-dev Templates API
  description: Email templates with `{{variable}}` interpolation
  humanURL: https://docs.groundmail.dev/api-explorer
  baseURL: https://api.groundmail.dev
  tags:
  - Templates
  properties:
  - type: OpenAPI
    url: openapi/groundmail-dev-templates-api-openapi.yml
  - type: JSONSchema
    url: json-schema/groundmail-dev-send-email-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-list-item-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-webhook-event-payload-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-domain-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-create-migration-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-remote-apply-dns-credentials-schema.json
- aid: groundmail-dev:groundmail-dev-tenants-api
  name: groundmail-dev Tenants API
  description: Your own customers inside one Groundmail account, each with its own domains, suppression list, stats, sending
    ramp and pause switch. Included on Scale and Dedicated.
  humanURL: https://docs.groundmail.dev/api-explorer
  baseURL: https://api.groundmail.dev
  tags:
  - Tenants
  properties:
  - type: OpenAPI
    url: openapi/groundmail-dev-tenants-api-openapi.yml
  - type: JSONSchema
    url: json-schema/groundmail-dev-send-email-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-list-item-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-webhook-event-payload-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-domain-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-create-migration-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-remote-apply-dns-credentials-schema.json
- aid: groundmail-dev:groundmail-dev-test-inbox-api
  name: groundmail-dev Test inbox API
  description: A test domain per team. Mail sent to it from any email provider is caught and never delivered, so tests can
    wait for an email and read its code and links.
  humanURL: https://docs.groundmail.dev/api-explorer
  baseURL: https://api.groundmail.dev
  tags:
  - Test inbox
  properties:
  - type: OpenAPI
    url: openapi/groundmail-dev-test-inbox-api-openapi.yml
  - type: JSONSchema
    url: json-schema/groundmail-dev-send-email-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-list-item-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-webhook-event-payload-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-domain-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-create-migration-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-remote-apply-dns-credentials-schema.json
- aid: groundmail-dev:groundmail-dev-validation-api
  name: groundmail-dev Validation API
  description: Groundmail validation — check an address before you accept or send to it
  humanURL: https://docs.groundmail.dev/api-explorer
  baseURL: https://api.groundmail.dev
  tags:
  - Validation
  properties:
  - type: OpenAPI
    url: openapi/groundmail-dev-validation-api-openapi.yml
  - type: JSONSchema
    url: json-schema/groundmail-dev-send-email-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-list-item-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-webhook-event-payload-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-domain-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-create-migration-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-remote-apply-dns-credentials-schema.json
- aid: groundmail-dev:groundmail-dev-webhooks-api
  name: groundmail-dev Webhooks API
  description: The Webhooks API from groundmail-dev — 2 operation(s) for webhooks.
  humanURL: https://docs.groundmail.dev/api-explorer
  baseURL: https://api.groundmail.dev
  tags:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/groundmail-dev-webhooks-api-openapi.yml
  - type: JSONSchema
    url: json-schema/groundmail-dev-send-email-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-list-item-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-webhook-event-payload-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-domain-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-create-migration-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-remote-apply-dns-credentials-schema.json
- aid: groundmail-dev:groundmail-dev-api-keys-api
  name: groundmail-dev API Keys API
  description: Manage API keys (list, create, revoke)
  humanURL: https://docs.groundmail.dev/api-explorer
  baseURL: https://api.groundmail.dev
  tags:
  - API Keys
  properties:
  - type: OpenAPI
    url: openapi/groundmail-dev-api-keys-api-openapi.yml
  - type: JSONSchema
    url: json-schema/groundmail-dev-send-email-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-list-item-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-email-webhook-event-payload-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-domain-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-create-migration-request-schema.json
  - type: JSONSchema
    url: json-schema/groundmail-dev-remote-apply-dns-credentials-schema.json
x-enrichment:
  date: '2026-10-30'
  status: enriched
  artifacts_added: 33
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

groundmail-dev API — frequently asked questions

Does groundmail-dev have an API?

Yes. APIs.io lists 18 APIs from groundmail-dev, including groundmail-dev Automations API, groundmail-dev Deliverability API and groundmail-dev Dmarc API, and 15 more.

Is there an OpenAPI specification for the groundmail-dev API?

Yes. APIs.io indexes 18 OpenAPI specifications for groundmail-dev, each linked for download from this page.

How do I authenticate with the groundmail-dev API?

groundmail-dev documents its authentication (4 schemes). The details are profiled on APIs.io as Groundmail Dev Authentication.

How much does the groundmail-dev API cost?

APIs.io lists 2 pricing plans for groundmail-dev, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the groundmail-dev API ready for AI agents?

groundmail-dev has a Kin Score of 66.6 out of 100 (exemplar) and an Agent Readiness score of 63.8 (agent-native), scored by API Evangelist on 2026-10-31.

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