aid: crescendo-lab
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: freemium
  onboarding: self-serve
  trial: true
  try_now: true
  public: false
  label: Freemium (free trial) · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/crescendo-lab.png
name: Crescendo Lab
description: >-
  Crescendo Lab is a Taiwan-based, Asia-leading AI omnichannel customer
  communication software company (cresclab.com) serving 800+ global brands, and
  a LINE Biz-Solutions Gold Partner. Its platform spans MAAC (AI marketing
  automation), CAAC (conversational applications), and DAAC (data intelligence)
  across LINE, WhatsApp, SMS, email, and social channels. Its developer-facing
  surface is MAAC Go (sms.cresclab.com) — a self-serve, NCC-compliant Taiwan SMS
  API with a published OpenAPI spec, first-party Node/Python SDKs, a CLI, an
  official MCP server, and delivery webhooks. Surfaced as a 500 Global portfolio
  company and enriched into the API Evangelist network.
url: https://raw.githubusercontent.com/api-evangelist/crescendo-lab/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: enriched
x-tier-reason: portfolio-lead-enriched
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
tags:
- Company
- SMS
- Messaging
- Marketing Automation
- Customer Engagement
- Taiwan
- Omnichannel
- MCP
apis:
- aid: crescendo-lab:crescendo-lab-broadcast-api
  name: Crescendo Lab Broadcast API
  description: >-
    Bulk (1-to-many) SMS. Small batches dispatch inline; >30 recipients queue asynchronously.
  humanURL: https://sms.cresclab.com/developers.html
  baseURL: https://sms.cresclab.com/api
  tags:
  - Broadcast
  properties:
  - type: OpenAPI
    url: openapi/crescendo-lab-broadcast-api-openapi.yml
  - type: Webhooks
    url: asyncapi/crescendo-lab-maacgo-webhooks.yml
  - type: ErrorCatalog
    url: errors/crescendo-lab-problem-types.yml
  - type: Lifecycle
    url: lifecycle/crescendo-lab-lifecycle.yml
  - type: Conformance
    url: conformance/crescendo-lab-conformance.yml
  - type: DataModel
    url: data-model/crescendo-lab-data-model.yml
  - type: Sandbox
    url: sandbox/crescendo-lab-sandbox.yml
  - type: Documentation
    url: https://sms.cresclab.com/developers.html#api
  - type: APIReference
    url: https://sms.cresclab.com/openapi.yaml
  - type: GettingStarted
    url: https://sms.cresclab.com/developers.html
- aid: crescendo-lab:crescendo-lab-contacts-api
  name: Crescendo Lab Contacts API
  description: Address book with NCC-consent tracking.
  humanURL: https://sms.cresclab.com/developers.html
  baseURL: https://sms.cresclab.com/api
  tags:
  - Contacts
  properties:
  - type: OpenAPI
    url: openapi/crescendo-lab-contacts-api-openapi.yml
  - type: Webhooks
    url: asyncapi/crescendo-lab-maacgo-webhooks.yml
  - type: ErrorCatalog
    url: errors/crescendo-lab-problem-types.yml
  - type: Lifecycle
    url: lifecycle/crescendo-lab-lifecycle.yml
  - type: Conformance
    url: conformance/crescendo-lab-conformance.yml
  - type: DataModel
    url: data-model/crescendo-lab-data-model.yml
  - type: Sandbox
    url: sandbox/crescendo-lab-sandbox.yml
  - type: Documentation
    url: https://sms.cresclab.com/developers.html#api
  - type: APIReference
    url: https://sms.cresclab.com/openapi.yaml
  - type: GettingStarted
    url: https://sms.cresclab.com/developers.html
- aid: crescendo-lab:crescendo-lab-sms-api
  name: Crescendo Lab SMS API
  description: Transactional (1-to-1) SMS send + status.
  humanURL: https://sms.cresclab.com/developers.html
  baseURL: https://sms.cresclab.com/api
  tags:
  - SMS
  properties:
  - type: OpenAPI
    url: openapi/crescendo-lab-sms-api-openapi.yml
  - type: Webhooks
    url: asyncapi/crescendo-lab-maacgo-webhooks.yml
  - type: ErrorCatalog
    url: errors/crescendo-lab-problem-types.yml
  - type: Lifecycle
    url: lifecycle/crescendo-lab-lifecycle.yml
  - type: Conformance
    url: conformance/crescendo-lab-conformance.yml
  - type: DataModel
    url: data-model/crescendo-lab-data-model.yml
  - type: Sandbox
    url: sandbox/crescendo-lab-sandbox.yml
  - type: Documentation
    url: https://sms.cresclab.com/developers.html#api
  - type: APIReference
    url: https://sms.cresclab.com/openapi.yaml
  - type: GettingStarted
    url: https://sms.cresclab.com/developers.html
- aid: crescendo-lab:crescendo-lab-teams-api
  name: Crescendo Lab Teams API
  description: >-
    Cost-attribution teams. Tag sends with a team to see which team sent/spent how much (shared wallet
    — reporting only, not a wallet split).
  humanURL: https://sms.cresclab.com/developers.html
  baseURL: https://sms.cresclab.com/api
  tags:
  - Team
  tags_raw:
  - Teams
  properties:
  - type: OpenAPI
    url: openapi/crescendo-lab-teams-api-openapi.yml
  - type: Webhooks
    url: asyncapi/crescendo-lab-maacgo-webhooks.yml
  - type: ErrorCatalog
    url: errors/crescendo-lab-problem-types.yml
  - type: Lifecycle
    url: lifecycle/crescendo-lab-lifecycle.yml
  - type: Conformance
    url: conformance/crescendo-lab-conformance.yml
  - type: DataModel
    url: data-model/crescendo-lab-data-model.yml
  - type: Sandbox
    url: sandbox/crescendo-lab-sandbox.yml
  - type: Documentation
    url: https://sms.cresclab.com/developers.html#api
  - type: APIReference
    url: https://sms.cresclab.com/openapi.yaml
  - type: GettingStarted
    url: https://sms.cresclab.com/developers.html
- aid: crescendo-lab:crescendo-lab-maac-go-api-api
  name: Crescendo Lab MAAC Go API
  description: The MAAC Go API API from Crescendo Lab — 0 operation(s) for maac go api.
  humanURL: https://sms.cresclab.com/developers.html
  baseURL: https://sms.cresclab.com/api
  tags:
  - MAAC Go API
  properties:
  - type: OpenAPI
    url: openapi/crescendo-lab-maac-go-api-api-openapi.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: CapabilityMap
  url: capabilities/crescendo-lab-capability-edges.yml
  name: Crescendo Lab Business Capability Map
- url: https://blog.cresclab.com/zh-tw/rss.xml
  type: BlogRSS
- type: Overlay
  url: overlays/crescendo-lab-maacgo-overlay.yaml
- type: Website
  url: https://cresclab.com
- type: DeveloperPortal
  url: https://sms.cresclab.com/developers.html
- type: Documentation
  url: https://sms.cresclab.com/developers.html#api
- type: Blog
  url: https://blog.cresclab.com/zh-tw
- type: HelpCenter
  url: https://crescendolab.zendesk.com/hc/zh-tw
- type: Pricing
  url: https://cresclab.com/pricing
- type: SignUp
  url: https://sms.cresclab.com/signup.html
- type: Login
  url: https://sms.cresclab.com/app.html
- type: TermsOfService
  url: https://sms.cresclab.com/terms.html
- type: PrivacyPolicy
  url: https://sms.cresclab.com/privacy.html
- type: GitHubOrganization
  url: https://github.com/Crescendo-Lab
- type: LLMsTxt
  url: llms/crescendo-lab-llms.txt
- type: SDKs
  url: packages/crescendo-lab-packages.yml
- type: Packages
  url: packages/crescendo-lab-packages.yml
- type: CLI
  url: cli/crescendo-lab-cli.yml
- type: MCPServer
  url: mcp/crescendo-lab-mcp.yml
- type: ToolCrosswalk
  url: mcp/crescendo-lab-tool-crosswalk.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Plans
  url: plans/crescendo-lab-plans-pricing.yml
- type: RateLimits
  url: rate-limits/crescendo-lab-rate-limits.yml
- type: APIReference
  url: https://sms.cresclab.com/openapi.yaml
- type: GettingStarted
  url: https://sms.cresclab.com/developers.html
- type: Sandbox
  url: sandbox/crescendo-lab-sandbox.yml
- type: Authentication
  url: authentication/crescendo-lab-authentication.yml
- type: Conventions
  url: conventions/crescendo-lab-conventions.yml
- type: Idempotency
  url: conventions/crescendo-lab-conventions.yml
- type: DomainSecurity
  url: security/crescendo-lab-domain-security.yml
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 5
  pass: local-v1
  note: >-
    WellKnown pointer removed 2026-08-13 — well-known/crescendo-lab-well-known.yml
    records 18 probes across both hosts and every one returned 404, so the
    artifact documents an absence and must not assert a served surface.