Siena

Siena AI is an empathic AI agent platform built for commerce brands. It combines AI automation with human empathy to handle customer service across email, chat, SMS, social, and WhatsApp, and integrates with Shopify, Gorgias, Zendesk, Kustomer, Recharge, Klaviyo and 20+ commerce tools. Its agents cover support, shopping, reviews, QA, order tracking, and post-purchase workflows, letting brands automate 60-80% of support tickets while preserving brand voice. Siena is backed by Sierra Ventures and holds SOC 2 Type II, GDPR, CPRA, and HIPAA compliance.

Siena is profiled on the APIs.io network. Tagged areas include Company, Artificial Intelligence, AI Agents, Customer Service, and Customer Experience.

Siena’s developer surface includes documentation, pricing, engineering blog, and 13 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

27.5/100 thin ▬ flat Agent 12/100 agent aware Front door AI 6/6 dominant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

0 APIs 1 MCP Servers

Company Artificial Intelligence AI Agents Customer Service Customer Experience Conversational AI E-Commerce Support Automation

Kin Score

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

Composite quality — 27.5/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 0.4 / 17

Access Clarity 14.5 / 17

Operational Transparency 2.9 / 11

Contract Governance 0.0 / 10

Discoverability 5.0 / 9

Regulatory Posture 3.4 / 15

Agent readiness — 12/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 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 0 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 0 / 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 AI & Biometrics 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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0

11 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 2.4 — up to +19.5 composite points
Contract Governance scores 0.0 — up to +12.0 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/siena/apis.yml: open an issue on github.com/api-evangelist/siena 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Customer Support, Helpdesk and Contact Center	builds-on	34.5 (thin)	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 2

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (verified)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Siena MCP Server

Remote MCP server at mcp.siena.cx over HTTP.

MCP SERVER

Siena API pricing

Prices published by Siena, read 2026-10-07 from www.siena.cx/pricing.

Plan	Price
Platform fee	$750/month Includes: Siena's core AI engine and unlimited sandbox
Automation Pack	$0.90 each
Support & Implementation	Expert onboarding plus dedicated Slack support

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Siena Plans Pricing

3 plans

PLANS

Security Posture 3

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

Siena Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Siena Vulnerability Disclosure

Hackerone · contact published

SECURITY

Siena Trust Center

SOC 2 Type II, GDPR, CPRA, HIPAA

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Lifecycle

Lifecycle

Access & Security 5

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

TrustCenter

TrustCenter

Compliance

Compliance

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Operate 1

Status, limits, changes, and where to get help

StatusPage

StatusPage

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: siena
name: Siena
description: Siena AI is an empathic AI agent platform built for commerce brands. It combines AI automation with human empathy
  to handle customer service across email, chat, SMS, social, and WhatsApp, and integrates with Shopify, Gorgias, Zendesk,
  Kustomer, Recharge, Klaviyo and 20+ commerce tools. Its agents cover support, shopping, reviews, QA, order tracking, and
  post-purchase workflows, letting brands automate 60-80% of support tickets while preserving brand voice. Siena is backed
  by Sierra Ventures and holds SOC 2 Type II, GDPR, CPRA, and HIPAA compliance.
url: https://raw.githubusercontent.com/api-evangelist/siena/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
image: https://framerusercontent.com/assets/FHZo6GH2CeM1egfYU9t6ZdbpY.jpg
x-type: company
x-source: vc-portfolio
x-backed-by:
- sierra-ventures
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Artificial Intelligence
- AI Agents
- Customer Service
- Customer Experience
- Conversational AI
- E-Commerce
- Support Automation
tags_raw:
- Company
- AI
- AI Agents
- Customer Service
- Customer Experience
- Conversational AI
- Ecommerce
- Support Automation
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/siena-plans-pricing.yml
- type: Website
  url: https://siena.cx/
- type: Documentation
  url: https://docs.siena.cx/
- type: Pricing
  url: https://www.siena.cx/pricing
- type: Blog
  url: https://www.siena.cx/blog
- type: Login
  url: https://app.siena.cx/
- type: TermsOfService
  url: https://www.siena.cx/terms-of-service
- type: PrivacyPolicy
  url: https://www.siena.cx/privacy-policy
- type: Integrations
  url: https://www.siena.cx/integrations
- type: StatusPage
  url: https://status.siena.cx/
- type: LLMsTxt
  url: llms/siena-llms.txt
- type: DomainSecurity
  url: security/siena-domain-security.yml
- type: Lifecycle
  url: lifecycle/siena-lifecycle.yml
- type: TrustCenter
  url: security/siena-trust-center.yml
- type: Compliance
  url: https://sienaai.trust.site/
- type: VulnerabilityDisclosure
  url: security/siena-vulnerability-disclosure.yml
- type: Security
  url: security/siena-vulnerability-disclosure.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 6
  pass: local-v1

Siena API — frequently asked questions

How much does the Siena API cost?

Siena publishes its prices; its Platform fee plan is $750/month as of 2026-10-07. APIs.io lists 3 pricing plans for Siena, with each plan's price, limits and inclusions under Pricing on this page.

Does Siena have an MCP server?

Yes. APIs.io lists 1 MCP server for Siena: Remote MCP server at mcp.siena.cx over HTTP.

Is the Siena API ready for AI agents?

Siena has a Kin Score of 27.5 out of 100 (thin) and an Agent Readiness score of 12.2 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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