send16-com

Send16 provides email, SMS, and marketing automation services powered by Claude AI. It offers a unified platform for transactional and marketing communications, featuring customizable templates, automation workflows, and AI‑assisted content creation. Plans range from a free tier with 5,000 emails per month to enterprise options, and the service includes a developer portal with API documentation, SDKs, and MCP integration.

send16-com is listed with 1 API on the APIs.io network. Tagged areas include Email, Marketing, Automation, AI, and SaaS.

The send16-com catalog on APIs.io includes 1 event-driven AsyncAPI specification.

send16-com’s developer surface includes support, engineering blog, documentation, API reference, getting-started guide, pricing, and 23 more developer resources.

🌐 Visit website📡 Profile data on GitHub
48.5/100 developing Agent 35/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →
1 API
EmailMarketingAutomationAISaaS

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0
Composite quality — 48.5/100 · developing
Contract Quality 8.3 / 21
Developer Ergonomics 8.5 / 17
Access Clarity 15.1 / 17
Operational Transparency 2.0 / 11
Contract Governance 0.0 / 10
Discoverability 5.6 / 9
Regulatory Posture 4.2 / 15
Agent readiness — 35/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 6 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Delegated User Identity 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):
  • Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
  • 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
  • Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
  • Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
  • Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
7 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/send16-com/apis.yml: open an issue on github.com/api-evangelist/send16-com 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.

Send16 API

Email, SMS and marketing automation API as documented at Send16 developer portal.

Pricing Plans 1

Published pricing tiers and plan structures.

Send16 Com Plans Pricing

4 plans

PLANS

Event Specifications 1

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

Send16 Com Webhooks

ASYNCAPI

Security Posture 3

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

Send16 Com Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Send16 Com Vulnerability Disclosure

security.txt · contact published

SECURITY

Send16 Com Trust Center

SOC 2, GDPR

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

Login
Login
 DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt
 WellKnown
WellKnown

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Webhooks
Webhooks

Build 1

SDKs, sample code, and the tooling you integrate with

Postman
Postman

Access & Security 11

Authentication, authorization, and security posture

Compliance
Compliance
 SecurityTxt
SecurityTxt
 SecurityTxt
SecurityTxt
 SecurityTxt
SecurityTxt
 SecurityTxt
SecurityTxt
 SecurityTxt
SecurityTxt
 SecurityTxt
SecurityTxt
 Security
Security
 TrustCenter
TrustCenter
 VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity

Scroll for all 11

Operate 1

Status, limits, changes, and where to get help

Support
Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans
Plans
 Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Blog
Blog
 Website
Website

Other 2

Properties that don't map to a standard resource type

Hosts
Hosts
 Vendors
Vendors

Source (apis.yml)

apis.yml Raw ↑ 
aid: send16-com
name: send16-com
image: https://send16.com/opengraph-image
description: Send16 provides email, SMS, and marketing automation services powered by Claude AI. It offers a unified platform
  for transactional and marketing communications, featuring customizable templates, automation workflows, and AI‑assisted
  content creation. Plans range from a free tier with 5,000 emails per month to enterprise options, and the service includes
  a developer portal with API documentation, SDKs, and MCP integration.
url: https://artifacts.apis.io/send16-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-31 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-31'
modified: '2026-10-31'
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: API documentation provides a base URL but no OpenAPI, AsyncAPI, GraphQL, or other machine‑readable contract.
  evidence:
  - url: https://api.send16.com/openapi.json
    status: error
  checked: '2026-10-31'
tags:
- Email
- Marketing
- Automation
- AI
- SaaS
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Support
  url: https://help.send16.com/
- type: Blog
  url: https://blog.send16.com/
- type: Plans
  url: plans/send16-com-plans-pricing.yml
- type: Webhooks
  url: asyncapi/send16-com-webhooks.yml
- type: Compliance
  url: https://send16.com/security
- type: LLMsTxt
  url: llms/send16-com-llms.txt
- type: SecurityTxt
  url: well-known/send16-com-ws-security.txt
- type: SecurityTxt
  url: well-known/send16-com-security.txt
- type: SecurityTxt
  url: well-known/send16-com-help-security.txt
- type: SecurityTxt
  url: well-known/send16-com-docs-security.txt
- type: SecurityTxt
  url: well-known/send16-com-dev-security.txt
- type: SecurityTxt
  url: well-known/send16-com-app-security.txt
- type: WellKnown
  url: well-known/send16-com-well-known.yml
- type: Hosts
  url: hosts/send16-com-hosts.yml
- type: Vendors
  url: vendors/send16-com-vendors.yml
- type: Security
  url: https://send16.com/security
- type: Login
  url: https://app.send16.com/login
- type: TrustCenter
  url: security/send16-com-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/send16-com-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/send16-com-domain-security.yml
- type: Website
  url: https://send16.com/
- type: DeveloperPortal
  url: https://send16.com/developers
- type: Documentation
  url: https://send16.com/docs/api
- type: APIReference
  url: https://send16.com/docs/api
- type: GettingStarted
  url: https://send16.com/docs/quickstart
- type: Pricing
  url: https://send16.com/pricing
- type: TermsOfService
  url: https://send16.com/terms
- type: PrivacyPolicy
  url: https://send16.com/privacy
- type: Postman
  url: https://www.postman.com/send16/workspace
apis:
- name: Send16 API
  description: Email, SMS and marketing automation API as documented at Send16 developer portal.
  humanURL: https://send16.com/docs/api
  baseURL: https://api.send16.com
  aid: send16-com:send16-api
x-enrichment:
  date: '2026-10-31'
  status: enriched
  artifacts_added: 20
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

send16-com API — frequently asked questions

Does send16-com have an API?

Yes. APIs.io lists 1 API from send16-com, including Send16 API.

How much does the send16-com API cost?

APIs.io lists 4 pricing plans for send16-com, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the send16-com API ready for AI agents?

send16-com has a Kin Score of 48.5 out of 100 (developing) and an Agent Readiness score of 35.1 (agent-ready), scored by API Evangelist on 2026-10-31.

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