# Syllable **Canonical:** https://apis.io/providers/syllable/ **Website:** https://syllable.ai/ **APIs profiled:** 41 Syllable is a Mountain View, California company (founded 2017) that operates an agentic platform for building, deploying and optimizing AI voice, SMS, email, web-chat and WhatsApp agents, with a strong focus on healthcare patient experience and contact-center automation. The Syllable Platform SDK exposes a REST API at api.syllable.cloud covering agents, prompts, tools, services, data sources, channels and channel targets, sessions and transcripts, outbound campaigns and batches, insights workflows, directory, dashboards, incidents, organizations, roles, permissions and users. First-party TypeScript and Python SDKs, a Go CLI, a documentation MCP server and a published A2A agent card make it an unusually agent-forward developer surface. ## Kin Score — 59.5 / 100 (strong) Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+0.0 from 59.5). | Facet | Score | |---|---| | Discoverability | 81.5 | | Contract Quality | 66.7 | | Governance | 20.8 | | Operational Transparency | 44.7 | | Developer Ergonomics | 87.0 | | Commercial Clarity | 60.5 | Regulatory layer — **Telecommunications**: 41.7 (matched via tags). ## Agent readiness — 53.2 (agent-ready) | Dimension | Value | |---|---| | Spec Presence | yes | | Agentic Access | derived | | MCP Server | yes | | Auth Clarity | yes | | Idempotency | no | | Error Semantics | verified | | OpenAPI Examples | no | | Rate Limit Signal | no | | Event Surface Described | derived | | Agent Skills | yes | | Well Known Catalog | no | | Consent Identity | no | | Agent Card | flavored | | Dry Run Mode | no | ## APIs (41) - **Syllable Agents API** — Operations related to agent configuration. When a user interacts with the Syllable system, they do so by communicating with an agent. An agent is linked to a prompt, a custom me... - **Syllable Agents.test API** — Operations for testing agents with live text. These endpoints allow sending messages to an agent and receiving its responses. - **Syllable Bridge Phrases API** — The bridge_phrases API from Syllable — 2 operation(s) for bridge_phrases. - **Syllable Channels API** — Operations related to channel configuration. A channel is an organization-level point of communication, like a phone number or a web chat. A channel can be associated with an ag... - **Syllable Channels.targets API** — Operations related to channel target configuration. A channel target links a channel to an agent, allowing users to communicate with the agent through that channel. For more inf... - **Syllable Channels.twilio API** — Operations related to Twilio channel configuration. - **Syllable Channels.twilio.numbers API** — Operations related to setting up phone numbers in Twilio for use in channels. - **Syllable Conversation Config API** — The conversation-config API from Syllable — 1 operation(s) for conversation-config. - **Syllable Conversations API** — Operations related to conversations. A conversation is a record of messages between a user and an agent, and is composed of one or more sessions. - **Syllable Custom Messages API** — Operations related to custom message configuration. A custom message is a pre-configured message delivered by an agent as a greeting at the beginning of a conversation. Multiple... - **Syllable Dashboards API** — Operations related to dashboards. Currently the API/SDK only supports fetching basic information about dashboards. - **Syllable Data Sources API** — Operations related to data sources. A data source is a blob of text that can be made available to an agent's general info tools to provide more context to the agent when generat... - **Syllable Directory API** — Operations related to directory - **Syllable Events API** — Operations related to events. An event represents a specific occurrence during a session. Currently the API/SDK only supports fetching logged events. - **Syllable Incidents API** — Operations related to incidents. - **Syllable Insights API** — Operations related to insights results. An insight is a tool that processes conversation data to extract information and generate reports. - **Syllable Insights.folders API** — Operations related to insights upload folders. An insight folder is used to upload call recordings for insight workflow analysis. - **Syllable Insights.tools API** — Operations related to insights tool configurationss. An insight is a tool that processes conversation data to extract information and generate reports. - **Syllable Insights.workflows API** — Operations related to insights workflows. An workflow is series of tool invocations that processes conversation data to extract information and generate reports. - **Syllable Language Groups API** — Operations related to language groups. A language group is a collection of language, voice, and DTMF configuration that can be linked to an agent to define the languages and voi... - **Syllable Organizations API** — Operations related to organizations. - **Syllable Organizations.sip Ip Ranges API** — The organizations.sip_ip_ranges API from Syllable — 2 operation(s) for organizations.sip_ip_ranges. - **Syllable Outbound.batches API** — Operations related to outbound campaign batches - **Syllable Outbound.campaigns API** — Operations related to outbound message campaigns - **Syllable Permissions API** — Operations related to permissions. A permission is a specific capability or access level granted to a user within the Syllable system. Permissions are used to control access to ... - **Syllable Prompts API** — Operations related to prompts. A prompt defines the behavior of an agent by delivering instructions to the LLM about how the agent should behave. A prompt can be linked to one o... - **Syllable Pronunciations API** — The pronunciations API from Syllable — 3 operation(s) for pronunciations. - **Syllable Roles API** — Operations related to roles. A role is a collection of permissions that can be assigned to users to control their access to various features within the Syllable system. - **Syllable Services API** — Operations related to service configuration. A service is a collection of tools. You can specify an authentication method and values on a service, and any linked tools will use ... - **Syllable Session Debug API** — The session_debug API from Syllable — 3 operation(s) for session_debug. - **Syllable Session Labels API** — Operations related to labeling sessions with evaluations of quality and descriptions of issues the user encountered or other details. For more information, see [Console docs](ht... - **Syllable Sessions API** — Operations related to sessions. A session is a building block of a conversation. For more information, see [Console docs](https://docs.syllable.ai/workspaces/Sessions). - **Syllable Sessions.full Summary API** — The sessions.full-summary API from Syllable — 1 operation(s) for sessions.full-summary. - **Syllable Sessions.latency API** — The sessions.latency API from Syllable — 1 operation(s) for sessions.latency. - **Syllable Sessions.timeline API** — The sessions.timeline API from Syllable — 1 operation(s) for sessions.timeline. - **Syllable Sessions.transcript API** — The sessions.transcript API from Syllable — 1 operation(s) for sessions.transcript. - **Syllable Takeouts API** — The takeouts API from Syllable — 3 operation(s) for takeouts. - **Syllable Tools API** — Operations related to tool configuration. A tool is a function that an agent can call to perform actions like accessing databases, making API calls, or processing data. For an a... - **Syllable Users API** — The users API from Syllable — 4 operation(s) for users. - **Syllable V1 API** — The V1 API from Syllable — 4 operation(s) for v1. - …and 1 more, listed in full on the page. ## MCP servers (1) - **syllable-mcp.yml** ## Agentic access (1) - **Syllable Agentic Access** — 176 operations · 98 acting ## Security (3) - **Syllable Authentication** — apiKey · 1 scheme - **Syllable Domain Security** — TLSv1.3 · HSTS · DMARC - **Syllable Trust Center** — SOC 2 Type 2, HIPAA, HITRUST, GDPR ## Tags Company, Artificial Intelligence, AI Agents, Voice, Conversational AI, Contact Center, Healthcare, Telephony, SMS, Customer Experience --- Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/syllable/). Scores are computed from the provider's own public artifacts under a published rubric.