Sent

Sent provides a single API that enables developers to send messages via SMS, WhatsApp, and RCS. The service handles routing, compliance, formatting, and delivery, allowing customers in e‑commerce, SaaS, fintech, and healthcare to deliver authentication codes, order notifications, cart‑recovery messages, and marketing campaigns. Sent offers SDKs for multiple languages and signed webhooks for delivery tracking.

Sent is listed with 1 API on the APIs.io network. Tagged areas include SMS, WhatsApp, RCS, Messaging API, and Communications.

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

Sent’s developer surface includes changelog, authentication, support, signup flow, pricing, engineering blog, API reference, and 31 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

52.7/100 developing Agent 37/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API

SMS WhatsApp RCSMessaging APICommunications Developer Platform AuthenticationOrder Notifications

Kin Score

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

Composite quality — 52.7/100 · developing

Contract Quality 8.1 / 21

Developer Ergonomics 9.7 / 17

Access Clarity 11.2 / 17

Operational Transparency 7.9 / 11

Contract Governance 2.2 / 10

Discoverability 5.0 / 9

Regulatory Posture 3.9 / 15

Agent readiness — 37/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 0 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the 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/.

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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
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

6 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 38.0 — up to +15.5 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/sent/apis.yml: open an issue on github.com/api-evangelist/sent 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.

Sent API

Sent provides messaging APIs for SMS, WhatsApp and RCS.

Pricing Plans 1

Published pricing tiers and plan structures.

Sent Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Sent Rate Limits

3 limits

RATE LIMITS

Event Specifications 1

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

Sent Webhooks

ASYNCAPI

Semantic Vocabularies 1

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

Sent Context

75 classes · 11 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Sent API Rules

13 rules · 11 errors 1 warnings 1 info

SPECTRAL

Security Posture 3

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

Sent Authentication

2 schemes

SECURITY

Sent Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Sent Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

SignUp

SignUp

GettingStarted

GettingStarted

DeveloperPortal

DeveloperPortal

Documentation 2

Reference material describing how the API behaves

APIReference

APIReference

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

Webhooks

DataModel

Idempotency

Conventions

Conformance

Scroll for all 8

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 10

Authentication, authorization, and security posture

Security

Authentication

SecurityTxt

SecurityTxt

SecurityTxt

SecurityTxt

SecurityTxt

SecurityTxt

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Scroll for all 10

Operate 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

ChangeLog

ChangeLog

Support

Support

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: sent
name: Sent
image: https://www.sent.dm/media/images/og-image-4fee8e22.png
description: Sent provides a single API that enables developers to send messages via SMS, WhatsApp, and RCS. The service handles
  routing, compliance, formatting, and delivery, allowing customers in e‑commerce, SaaS, fintech, and healthcare to deliver
  authentication codes, order notifications, cart‑recovery messages, and marketing campaigns. Sent offers SDKs for multiple
  languages and signed webhooks for delivery tracking.
url: https://raw.githubusercontent.com/api-evangelist/sent/refs/heads/main/apis.yml
x-type: company
x-source: harvest:g2-catalog
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-21 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-21'
modified: '2026-10-21'
tags:
- SMS
- WhatsApp
- RCS
- Messaging API
- Communications
- Developer Platform
- Authentication
- Order Notifications
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: RateLimits
  url: rate-limits/sent-rate-limits.yml
- type: Plans
  url: plans/sent-plans-pricing.yml
- type: Spectral
  url: rules/sent-rules.yml
- type: JSONLD
  url: json-ld/sent-context.jsonld
- type: Vocabulary
  url: vocabulary/sent-vocabulary.yml
- type: Webhooks
  url: asyncapi/sent-webhooks.yml
- type: DataModel
  url: data-model/sent-data-model.yml
- type: ChangeLog
  url: changelog/sent-changelog.yml
- type: Idempotency
  url: conventions/sent-conventions.yml
- type: Conventions
  url: conventions/sent-conventions.yml
- type: Security
  url: https://www.sent.dm/resources/privacy-policy
- type: Authentication
  url: authentication/sent-authentication.yml
- type: Conformance
  url: conformance/sent-conformance.yml
- type: LLMsTxt
  url: llms/sent-llms.txt
- type: SecurityTxt
  url: well-known/sent-sent-security.txt
- type: SecurityTxt
  url: well-known/sent-security.txt
- type: SecurityTxt
  url: well-known/sent-docs-security.txt
- type: SecurityTxt
  url: well-known/sent-dev-security.txt
- type: SecurityTxt
  url: well-known/sent-app-security.txt
- type: SecurityTxt
  url: well-known/sent-api-security.txt
- type: WellKnown
  url: well-known/sent-well-known.yml
- type: Hosts
  url: hosts/sent-hosts.yml
- type: Vendors
  url: vendors/sent-vendors.yml
- type: TermsOfService
  url: https://www.sent.dm/legal/terms-of-service
- type: Support
  url: https://help.sent.dm
- type: SignUp
  url: https://app.sent.dm/sign-up
- type: PrivacyPolicy
  url: https://www.sent.dm/en/legal/privacy-policy
- type: Pricing
  url: https://www.sent.dm/pricing
- type: Newsroom
  url: https://www.sent.dm/news
- type: GitHubOrganization
  url: https://github.com/sentdm
- type: Blog
  url: https://www.sent.dm/blog
- type: APIReference
  url: https://docs.sent.dm/reference/api
- type: GettingStarted
  url: https://docs.sent.dm/reference/api/profiles/SentDmServicesEndpointsCustomerAPIv3ProfilesCompleteProfileEndpoint
- type: Documentation
  url: https://docs.sent.dm/
- type: DeveloperPortal
  url: https://docs.sent.dm\
- type: VulnerabilityDisclosure
  url: security/sent-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/sent-domain-security.yml
- type: Website
  url: https://sent.dm/
apis:
- name: Sent API
  description: Sent provides messaging APIs for SMS, WhatsApp and RCS.
  humanURL: https://www.sent.dm/
  aid: sent:sent-api
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: The provider's documentation site is a JavaScript-rendered Next.js application with no machine‑readable OpenAPI,
    GraphQL, AsyncAPI or other contract files.
  evidence:
  - url: https://www.sent.dm/
    status: 200
  checked: '2026-10-21'
x-enrichment:
  date: '2026-10-21'
  status: enriched
  artifacts_added: 31
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Sent API — frequently asked questions

Does Sent have an API?

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

How do I authenticate with the Sent API?

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

How much does the Sent API cost?

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

Is the Sent API ready for AI agents?

Sent has a Kin Score of 52.7 out of 100 (developing) and an Agent Readiness score of 36.7 (agent-ready), scored by API Evangelist on 2026-10-31.

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get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
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