Apptoto

Apptoto provides automated appointment reminders via SMS, email, and voice messages to reduce no‑shows, streamline scheduling, and improve client satisfaction. Founded in 2010, the platform offers a 14‑day free trial and integrates with calendars, payment systems, and popular apps. It serves businesses of all sizes to grow revenue through reliable communications.

Apptoto publishes 21 API contracts indexed on the APIs.io network, including Address Books API, Availability API, Book Now API, and 18 more. Tagged areas include Company, Scheduling, Appointment-Reminders, SMS, and Email.

The Apptoto catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

Apptoto’s developer surface includes authentication, support, getting-started guide, engineering blog, API reference, documentation, pricing, and 21 more developer resources.

🌐 Visit website📡 Profile data on GitHub
51.4/100 developing Agent 46/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →
1 published contract 1 Agent Skills
CompanySchedulingAppointment-RemindersSMSEmailVoice

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0
Composite quality — 51.4/100 · developing
Contract Quality 10.9 / 21
Developer Ergonomics 8.4 / 17
Access Clarity 11.2 / 17
Operational Transparency 4.9 / 11
Contract Governance 1.9 / 10
Discoverability 4.6 / 9
Regulatory Posture 5.3 / 15
Agent readiness — 46/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 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 4 / 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 0 / 3
Regulatory Posture applies to this provider. Its tags matched the Telecommunications 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/.
Show this score on your site. Kin Score badge preview for Apptoto It updates itself when the score changes. Paste this where you link to your API docs: 
<a href="https://apis.io/providers/apptoto/"><img src="https://apis.io/badge/apptoto/card.svg" alt="Apptoto on APIs.io — Kin Score by API Evangelist"></a>
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Raise your score.
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
  • 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
  • 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
  • Dry-Run / Simulate Mode +4 pts — OpenAPI: destructive operations expose a dry_run / simulate / preview / validate_only parameter
2 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
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/apptoto/apis.yml: open an issue on github.com/api-evangelist/apptoto 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 21

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

Apptoto Address Books API

The Address Books API from Apptoto — 1 operation(s) for address books.

Apptoto Availability API

The Availability API from Apptoto — 1 operation(s) for availability.

Apptoto Book Now API

The Book Now API from Apptoto — 1 operation(s) for book now.

Apptoto Booking Pages API

The Booking Pages API from Apptoto — 1 operation(s) for booking pages.

Apptoto Bookings API

The Bookings API from Apptoto — 1 operation(s) for bookings.

Apptoto Calendars API

The Calendars API from Apptoto — 1 operation(s) for calendars.

Apptoto Contact API

The Contact API from Apptoto — 1 operation(s) for contact.

Apptoto Contacts API

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

Apptoto Conversation Messages API

The Conversation Messages API from Apptoto — 1 operation(s) for conversation messages.

Apptoto Conversation Reply API

The Conversation Reply API from Apptoto — 1 operation(s) for conversation reply.

Apptoto Conversation Templates API

The Conversation Templates API from Apptoto — 1 operation(s) for conversation templates.

Apptoto Conversations API

The Conversations API from Apptoto — 1 operation(s) for conversations.

Apptoto Event API

The Event API from Apptoto — 3 operation(s) for event.

Apptoto Events API

The Events API from Apptoto — 1 operation(s) for events.

Apptoto Import API

The Import API from Apptoto — 1 operation(s) for import.

Apptoto Lists API

The Lists API from Apptoto — 1 operation(s) for lists.

Apptoto Participant API

The Participant API from Apptoto — 2 operation(s) for participant.

Apptoto Participants API

The Participants API from Apptoto — 2 operation(s) for participants.

Apptoto Start Conversation API

The Start Conversation API from Apptoto — 1 operation(s) for start conversation.

Apptoto Webhooks API

The Webhooks API from Apptoto — 1 operation(s) for webhooks.

Apptoto User Info API

The User Info API from Apptoto — 1 operation(s) for user info.

Scroll for all 21

Agent Skills 1

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

apptoto-create-and-tag-contact

AGENT SKILL

Pricing Plans 1

Published pricing tiers and plan structures.

Apptoto Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Apptoto Rate Limits

2 limits

RATE LIMITS

Event Specifications 1

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

Apptoto Webhooks

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Apptoto API Rules

9 rules · 5 errors 2 warnings 2 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Apptoto Api Settings Overlay

0 actions · update

UNRECORDED

Security Posture 2

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

Apptoto Authentication

2 schemes

SECURITY

Apptoto Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Apptoto Scopes

16 scopes · authorizationCode

16 scopes

SCOPES

Agentic Access 1

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

Apptoto Agentic Access

43 operations · 24 acting

43 operations · 24 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login
Login
 GettingStarted
GettingStarted

Documentation 2

Reference material describing how the API behaves

APIReference
APIReference
 Documentation
Documentation

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 AgentSkill
AgentSkill
 LLMsTxt
LLMsTxt
 WellKnown
WellKnown

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Spectral
Spectral
 Webhooks
Webhooks
 ErrorCatalog
ErrorCatalog
 Conformance
Conformance
 Webhooks
Webhooks

Access & Security 3

Authentication, authorization, and security posture

Authentication
Authentication
 OAuthScopes
OAuthScopes
 DomainSecurity
DomainSecurity

Operate 3

Status, limits, changes, and where to get help

RateLimits
RateLimits
 Support
Support
 StatusPage
StatusPage

Commercial 4

Pricing, plans, and the legal terms of use

Plans
Plans
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy
 Pricing
Pricing

Company 3

The organization behind the API

Blog
Blog
 Website
Website
 About
About

Other 2

Properties that don't map to a standard resource type

Hosts
Hosts
 Vendors
Vendors

Source (apis.yml)

apis.yml Raw ↑ 
aid: apptoto
name: Apptoto
description: Apptoto provides automated appointment reminders via SMS, email, and voice messages to reduce no‑shows, streamline
  scheduling, and improve client satisfaction. Founded in 2010, the platform offers a 14‑day free trial and integrates with
  calendars, payment systems, and popular apps. It serves businesses of all sizes to grow revenue through reliable communications.
url: https://artifacts.apis.io/apptoto/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-28 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-28'
modified: '2026-10-28'
tags:
- Company
- Scheduling
- Appointment-Reminders
- SMS
- Email
- Voice
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/apptoto-agentic-access.yml
- type: RateLimits
  url: rate-limits/apptoto-rate-limits.yml
- type: Plans
  url: plans/apptoto-plans-pricing.yml
- type: Spectral
  url: rules/apptoto-rules.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Webhooks
  url: asyncapi/apptoto-webhooks.yml
- type: Authentication
  url: authentication/apptoto-authentication.yml
- type: ErrorCatalog
  url: errors/apptoto-problem-types.yml
- type: Conformance
  url: conformance/apptoto-conformance.yml
- type: LLMsTxt
  url: llms/apptoto-llms.txt
- type: WellKnown
  url: well-known/apptoto-well-known.yml
- type: Hosts
  url: hosts/apptoto-hosts.yml
- type: Vendors
  url: vendors/apptoto-vendors.yml
- type: Webhooks
  url: https://www.apptoto.com/apptoto-manual/article/webhooks
- type: TermsOfService
  url: https://www.apptoto.com/tos
- type: Support
  url: https://www.apptoto.com/support
- type: StatusPage
  url: https://status.apptoto.com/
- type: PrivacyPolicy
  url: https://www.apptoto.com/privacy-policy
- type: Login
  url: https://www.apptoto.com/login
- type: GettingStarted
  url: https://www.apptoto.com/apptoto-manual/article/getting-started/
- type: Blog
  url: https://www.apptoto.com/blog
- type: APIReference
  url: https://www.apptoto.com/llms.txt
- type: OAuthScopes
  url: scopes/apptoto-scopes.yml
- type: DomainSecurity
  url: security/apptoto-domain-security.yml
- type: Website
  url: https://apptoto.com/
- type: Documentation
  url: https://apidocs.apptoto.com/
- type: Pricing
  url: https://www.apptoto.com/pricing
- type: About
  url: https://www.apptoto.com/about
apis:
- aid: apptoto:apptoto-address-books-api
  name: Apptoto Address Books API
  description: The Address Books API from Apptoto — 1 operation(s) for address books.
  baseURL: https://api.apptoto.com
  tags:
  - Address Books
  properties:
  - type: OpenAPI
    url: openapi/apptoto-address-books-api-openapi.yml
- aid: apptoto:apptoto-availability-api
  name: Apptoto Availability API
  description: The Availability API from Apptoto — 1 operation(s) for availability.
  baseURL: https://api.apptoto.com
  tags:
  - Availability
  properties:
  - type: OpenAPI
    url: openapi/apptoto-availability-api-openapi.yml
- aid: apptoto:apptoto-book-now-api
  name: Apptoto Book Now API
  description: The Book Now API from Apptoto — 1 operation(s) for book now.
  baseURL: https://api.apptoto.com
  tags:
  - Book Now
  properties:
  - type: OpenAPI
    url: openapi/apptoto-book-now-api-openapi.yml
- aid: apptoto:apptoto-booking-pages-api
  name: Apptoto Booking Pages API
  description: The Booking Pages API from Apptoto — 1 operation(s) for booking pages.
  baseURL: https://api.apptoto.com
  tags:
  - Booking Pages
  properties:
  - type: OpenAPI
    url: openapi/apptoto-booking-pages-api-openapi.yml
- aid: apptoto:apptoto-bookings-api
  name: Apptoto Bookings API
  description: The Bookings API from Apptoto — 1 operation(s) for bookings.
  baseURL: https://api.apptoto.com
  tags:
  - Bookings
  properties:
  - type: OpenAPI
    url: openapi/apptoto-bookings-api-openapi.yml
- aid: apptoto:apptoto-calendars-api
  name: Apptoto Calendars API
  description: The Calendars API from Apptoto — 1 operation(s) for calendars.
  baseURL: https://api.apptoto.com
  tags:
  - Calendars
  properties:
  - type: OpenAPI
    url: openapi/apptoto-calendars-api-openapi.yml
- aid: apptoto:apptoto-contact-api
  name: Apptoto Contact API
  description: The Contact API from Apptoto — 1 operation(s) for contact.
  baseURL: https://api.apptoto.com
  tags:
  - Contact
  properties:
  - type: OpenAPI
    url: openapi/apptoto-contact-api-openapi.yml
- aid: apptoto:apptoto-contacts-api
  name: Apptoto Contacts API
  description: The Contacts API from Apptoto — 2 operation(s) for contacts.
  baseURL: https://api.apptoto.com
  tags:
  - Contacts
  properties:
  - type: OpenAPI
    url: openapi/apptoto-contacts-api-openapi.yml
- aid: apptoto:apptoto-conversation-messages-api
  name: Apptoto Conversation Messages API
  description: The Conversation Messages API from Apptoto — 1 operation(s) for conversation messages.
  baseURL: https://api.apptoto.com
  tags:
  - Conversation Messages
  properties:
  - type: OpenAPI
    url: openapi/apptoto-conversation-messages-api-openapi.yml
- aid: apptoto:apptoto-conversation-reply-api
  name: Apptoto Conversation Reply API
  description: The Conversation Reply API from Apptoto — 1 operation(s) for conversation reply.
  baseURL: https://api.apptoto.com
  tags:
  - Conversation Reply
  properties:
  - type: OpenAPI
    url: openapi/apptoto-conversation-reply-api-openapi.yml
- aid: apptoto:apptoto-conversation-templates-api
  name: Apptoto Conversation Templates API
  description: The Conversation Templates API from Apptoto — 1 operation(s) for conversation templates.
  baseURL: https://api.apptoto.com
  tags:
  - Conversation Templates
  properties:
  - type: OpenAPI
    url: openapi/apptoto-conversation-templates-api-openapi.yml
- aid: apptoto:apptoto-conversations-api
  name: Apptoto Conversations API
  description: The Conversations API from Apptoto — 1 operation(s) for conversations.
  baseURL: https://api.apptoto.com
  tags:
  - Conversations
  properties:
  - type: OpenAPI
    url: openapi/apptoto-conversations-api-openapi.yml
- aid: apptoto:apptoto-event-api
  name: Apptoto Event API
  description: The Event API from Apptoto — 3 operation(s) for event.
  baseURL: https://api.apptoto.com
  tags:
  - Event
  properties:
  - type: OpenAPI
    url: openapi/apptoto-event-api-openapi.yml
- aid: apptoto:apptoto-events-api
  name: Apptoto Events API
  description: The Events API from Apptoto — 1 operation(s) for events.
  baseURL: https://api.apptoto.com
  tags:
  - Events
  properties:
  - type: OpenAPI
    url: openapi/apptoto-events-api-openapi.yml
- aid: apptoto:apptoto-import-api
  name: Apptoto Import API
  description: The Import API from Apptoto — 1 operation(s) for import.
  baseURL: https://api.apptoto.com
  tags:
  - Import
  properties:
  - type: OpenAPI
    url: openapi/apptoto-import-api-openapi.yml
- aid: apptoto:apptoto-lists-api
  name: Apptoto Lists API
  description: The Lists API from Apptoto — 1 operation(s) for lists.
  baseURL: https://api.apptoto.com
  tags:
  - Lists
  properties:
  - type: OpenAPI
    url: openapi/apptoto-lists-api-openapi.yml
- aid: apptoto:apptoto-participant-api
  name: Apptoto Participant API
  description: The Participant API from Apptoto — 2 operation(s) for participant.
  baseURL: https://api.apptoto.com
  tags:
  - Participant
  properties:
  - type: OpenAPI
    url: openapi/apptoto-participant-api-openapi.yml
- aid: apptoto:apptoto-participants-api
  name: Apptoto Participants API
  description: The Participants API from Apptoto — 2 operation(s) for participants.
  baseURL: https://api.apptoto.com
  tags:
  - Participants
  properties:
  - type: OpenAPI
    url: openapi/apptoto-participants-api-openapi.yml
- aid: apptoto:apptoto-start-conversation-api
  name: Apptoto Start Conversation API
  description: The Start Conversation API from Apptoto — 1 operation(s) for start conversation.
  baseURL: https://api.apptoto.com
  tags:
  - Start Conversation
  properties:
  - type: OpenAPI
    url: openapi/apptoto-start-conversation-api-openapi.yml
- aid: apptoto:apptoto-webhooks-api
  name: Apptoto Webhooks API
  description: The Webhooks API from Apptoto — 1 operation(s) for webhooks.
  baseURL: https://api.apptoto.com
  tags:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/apptoto-webhooks-api-openapi.yml
- aid: apptoto:apptoto-user-info-api
  name: Apptoto User Info API
  description: The User Info API from Apptoto — 1 operation(s) for user info.
  baseURL: https://api.apptoto.com
  tags:
  - User Info
  properties:
  - type: OpenAPI
    url: openapi/apptoto-user-info-api-openapi.yml
x-submission-probe: 200, 2026-10-26
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: Documentation is served as HTML pages requiring JavaScript to render markdown, preventing machine‑readable spec
    discovery.
  evidence:
  - url: https://apidocs.apptoto.com/reference
    status: 200
  checked: '2026-10-28'
x-enrichment:
  date: '2026-10-28'
  status: enriched
  artifacts_added: 39
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Apptoto API — frequently asked questions

Does Apptoto have an API?

Yes. APIs.io lists 21 APIs from Apptoto, including Apptoto Address Books API, Apptoto Availability API and Apptoto Book Now API, and 18 more.

Is there an OpenAPI specification for the Apptoto API?

Yes. APIs.io indexes 21 OpenAPI specifications for Apptoto, each linked for download from this page.

How do I authenticate with the Apptoto API?

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

How much does the Apptoto API cost?

APIs.io lists 1 pricing plan for Apptoto, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the Apptoto API ready for AI agents?

Apptoto has a Kin Score of 51.4 out of 100 (developing) and an Agent Readiness score of 46.3 (agent-ready), scored by API Evangelist on 2026-10-31.

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