Crescendo

Crescendo is an AI-native customer experience (CX) platform that unifies AI agents for chat, voice, email, and messaging with quality assurance, workforce management, and business insights. The Crescendo Platform API (OpenAPI 3.1) is a tenant-scoped HTTP API for provisioning tenant configuration and documents, exporting assistant and voice-of-customer (VOC) conversations for reporting with cursor pagination, uploading audio recordings for asynchronous VOC processing, and driving assistants through a hosted Model Context Protocol (MCP) bots server over Streamable HTTP. Authentication is a tenant-scoped bearer API key. Crescendo is backed by General Catalyst and Trinity Ventures.

Crescendo publishes 5 APIs on the APIs.io network, including MCP API, Provisioning API, Reporting API, and 2 more. Tagged areas include Company, Customer Experience, Customer-Support, Artificial Intelligence, and AI Agents.

Crescendo’s developer surface includes documentation, API reference, quickstart, engineering blog, support, authentication, and 16 more developer resources.

🌐 Visit website 📡 Source on GitHub

40.1/100 developing ▬ flat Agent 35/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs 1 MCP Servers

Company Customer Experience Customer-Support Artificial Intelligence AI Agents Contact Center Conversational AI Voice of Customer MCP

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 40.1/100 · developing

Contract Quality 12.0 / 23

Developer Ergonomics 10.6 / 18

Access Clarity 3.8 / 18

Operational Transparency 0.0 / 12

Contract Governance 0.5 / 11

Discoverability 6.8 / 9

Create-or-Update Ergonomics 3.3 / 10

Agent readiness — 35/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 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 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

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 github.com/api-evangelist/crescendo: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 5

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

Crescendo MCP API

Model Context Protocol (MCP) endpoints.

Crescendo Provisioning API

Tenant-scoped provisioning resources.

Crescendo Reporting API

Reporting-friendly exports (cursor pagination).

Crescendo Service API

Service metadata and health.

Crescendo VOC API

Upload recordings for VOC processing.

Open Collections 6

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Crescendo Platform MCP API

OPEN COLLECTION

Crescendo Platform MCP Provisioning API

OPEN COLLECTION

Crescendo Platform MCP Reporting API

OPEN COLLECTION

Crescendo Platform MCP Service API

OPEN COLLECTION

Crescendo Platform MCP VOC API

OPEN COLLECTION

MCP Servers 1

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

Crescendo MCP Server

MCP SERVER

Security Posture 2

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

Crescendo Authentication

apiKey/http · 2 schemes

SECURITY

Crescendo Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Crescendo Agentic Access

17 operations · 8 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Quickstart

Quickstart

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

MCPServer

AgenticAccess

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Conformance

Lifecycle

DataModel

Components

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: crescendo
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/crescendo.png
name: Crescendo
description: Crescendo is an AI-native customer experience (CX) platform that unifies AI agents for chat, voice, email, and
  messaging with quality assurance, workforce management, and business insights. The Crescendo Platform API (OpenAPI 3.1)
  is a tenant-scoped HTTP API for provisioning tenant configuration and documents, exporting assistant and voice-of-customer
  (VOC) conversations for reporting with cursor pagination, uploading audio recordings for asynchronous VOC processing, and
  driving assistants through a hosted Model Context Protocol (MCP) bots server over Streamable HTTP. Authentication is a tenant-scoped
  bearer API key. Crescendo is backed by General Catalyst and Trinity Ventures.
url: https://raw.githubusercontent.com/api-evangelist/crescendo/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- general-catalyst
- trinity-ventures
x-tier: enriched
x-tier-reason: has-public-api
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Customer Experience
- Customer-Support
- Artificial Intelligence
- AI Agents
- Contact Center
- Conversational AI
- Voice of Customer
- MCP
tags_raw:
- Company
- Customer Experience
- Customer Support
- Artificial Intelligence
- AI Agents
- Contact Center
- Conversational AI
- Voice of Customer
- MCP
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: crescendo:crescendo-mcp-api
  name: Crescendo MCP API
  description: Model Context Protocol (MCP) endpoints.
  humanURL: https://docs.crescendo.ai/api-reference/introduction
  baseURL: https://platform.crescendo.ai
  tags:
  - MCP
  properties:
  - type: OpenAPI
    url: openapi/crescendo-mcp-api-openapi.yml
- aid: crescendo:crescendo-provisioning-api
  name: Crescendo Provisioning API
  description: Tenant-scoped provisioning resources.
  humanURL: https://docs.crescendo.ai/api-reference/introduction
  baseURL: https://platform.crescendo.ai
  tags:
  - Provisioning
  properties:
  - type: OpenAPI
    url: openapi/crescendo-provisioning-api-openapi.yml
- aid: crescendo:crescendo-reporting-api
  name: Crescendo Reporting API
  description: Reporting-friendly exports (cursor pagination).
  humanURL: https://docs.crescendo.ai/api-reference/introduction
  baseURL: https://platform.crescendo.ai
  tags:
  - Reporting
  properties:
  - type: OpenAPI
    url: openapi/crescendo-reporting-api-openapi.yml
- aid: crescendo:crescendo-service-api
  name: Crescendo Service API
  description: Service metadata and health.
  humanURL: https://docs.crescendo.ai/api-reference/introduction
  baseURL: https://platform.crescendo.ai
  tags:
  - Service
  properties:
  - type: OpenAPI
    url: openapi/crescendo-service-api-openapi.yml
- aid: crescendo:crescendo-voc-api
  name: Crescendo VOC API
  description: Upload recordings for VOC processing.
  humanURL: https://docs.crescendo.ai/api-reference/introduction
  baseURL: https://platform.crescendo.ai
  tags:
  - VOC
  properties:
  - type: OpenAPI
    url: openapi/crescendo-voc-api-openapi.yml
common:
- type: Overlay
  url: overlays/crescendo-platform-overlay.yaml
- type: Documentation
  url: https://docs.crescendo.ai
- type: DeveloperPortal
  url: https://docs.crescendo.ai
- type: APIReference
  url: https://docs.crescendo.ai/api-reference/introduction
- type: Quickstart
  url: https://docs.crescendo.ai/quickstart
- type: LLMsTxt
  url: llms/crescendo-llms.txt
- type: Blog
  url: https://www.crescendo.ai/blog
- type: Support
  url: https://www.crescendo.ai/contact
- type: TermsOfService
  url: https://crescendo.ai/policies/website-terms-of-use
- type: PrivacyPolicy
  url: https://www.crescendo.ai/policies/privacy
- type: Website
  url: https://www.crescendo.ai
- type: MCPServer
  url: mcp/crescendo-mcp.yml
- type: Authentication
  url: authentication/crescendo-authentication.yml
- type: AgenticAccess
  url: agentic-access/crescendo-agentic-access.yml
- type: DomainSecurity
  url: security/crescendo-domain-security.yml
- type: Conventions
  url: conventions/crescendo-conventions.yml
- type: ErrorCatalog
  url: errors/crescendo-problem-types.yml
- type: Conformance
  url: conformance/crescendo-conformance.yml
- type: Lifecycle
  url: lifecycle/crescendo-lifecycle.yml
- type: DataModel
  url: data-model/crescendo-data-model.yml
- type: Components
  url: components/crescendo-components.yml
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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