SignalWire
SignalWire is a Programmable Unified Communications (PUC) platform for voice, messaging, video, fax, SIP and AI voice agents, built by the team behind FreeSWITCH. It publishes two first-party OpenAPI 3.1 contracts from its public documentation repository — a 253-operation SignalWire REST API covering calling, messaging, video rooms, phone number management, Campaign Registry/10DLC, WhatsApp, Datasphere, SIP resources, subscribers, AI agents and logs, and a 79-operation Twilio-compatible Compatibility (LaML) API at /api/laml/2010-04-01 — plus an OpenRPC 1.3.2 JSON-RPC contract for live call control, a JSON Schema for SWML (SignalWire Markup Language), and 19 OpenAPI 3.1 webhook definitions covering AI/SWAIG, calling and messaging callbacks. Every request is served from a per-customer Space subdomain, {space_name}.signalwire.com, over HTTPS only.
Solid contracts, transparent operations, and an easy start — typically complete on four or five facets with one clear soft spot.
API Evangelist profiles SignalWire the way a machine reads it — 89 machine-readable artifacts across 4 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — SignalWire scores 65.8/100 (strong), with a separate agent-readiness read of 38/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-01 · rubric v0.18.0
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</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile SignalWire
Each block below is one kind of artifact we hold for SignalWire. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 80
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
SignalWire Calling API (JSON-RPC)
An OpenRPC 1.3.2 contract for real-time control of live calls over RELAY — 8 methods (calling.dial, calling.update, calling.end, calling.ai_hold, calling.ai_unhold, calling.ai_m...
SignalWire Accounts API
Manage SignalWire projects and subprojects.
SignalWire Addresses API
Client-side endpoints for listing and retrieving resource addresses using [subscriber](/docs/platform/subscribers) access tokens (SAT). Intended for use with the Browser SDK to ...
SignalWire AI Agents: Custom API
Endpoints related to creating & managing SignalWire AI Agents
SignalWire AI Agents: Dialogflow API
Endpoints related to creating & managing Dialogflow Agents
SignalWire AI Chat API
Endpoints related to holding a text conversation with an AI agent
SignalWire AI Webhooks API
Callbacks an AI agent sends to your server. The same payloads apply to every surface an agent runs on — voice calls, Amazon Bedrock agents, sidecar agents, and text conversations.
SignalWire Applications API
Manage cXML applications for handling voice and messaging.
SignalWire Available Phone Numbers API
Search for available phone numbers to purchase.
SignalWire Call Flows API
Endpoints related to creating & managing Call Flows
SignalWire Calling Webhooks API
Callbacks about a call: the SWML document request sent when a call arrives, and the progress of work you started on it such as a transcription or a background audio stream.
SignalWire Calls API
Manage voice calls and call recordings.
SignalWire Campaign Registry: Brands API
Register and manage brands for 10DLC campaign registration.
SignalWire Campaign Registry: Campaigns API
Create and manage 10DLC campaigns for A2P messaging compliance.
SignalWire Campaign Registry: Phone Number Assignments API
Assign and manage phone numbers within 10DLC campaigns.
SignalWire Chat Tokens API
Manage Chat tokens.
SignalWire Chunks API
Manage chunks within Datasphere documents.
SignalWire Conference Logs API
Manage and query conference log data.
SignalWire Conference Participants API
Manage participants in conference calls.
SignalWire Conference Recordings API
Manage recordings for conference calls.
SignalWire Conference Rooms API
Endpoints related to creating & managing Conference Rooms
SignalWire Conference Streams API
Manage media streams for conferences.
SignalWire Conference Tokens API
Manage conference tokens
SignalWire Conferences API
Manage conference calls.
SignalWire cXML Applications API
Endpoints related to creating & managing cXML Applications
SignalWire CXML Scripts API
Manage cXML scripts for storing XML instructions.
SignalWire cXML Webhook API
Endpoints related to creating & managing cXML Webhooks
SignalWire Documents API
Manage Datasphere documents.
SignalWire Domain Applications API
Endpoints related to managing Domain Applications
SignalWire E911 Addresses API
Manage E911 addresses for regulatory compliance and phone number provisioning.
SignalWire Fax Logs API
Endpoints related to accessing fax logs
SignalWire Fax Media API
Manage fax media files.
SignalWire Faxes API
Send and manage faxes.
SignalWire FreeSWITCH Connector API
Endpoints related to creating & managing FreeSWITCH Connectors
SignalWire Imported Phone Numbers API
Import phone numbers hosted elsewhere into your SignalWire Space.
SignalWire Incoming Phone Numbers API
Manage phone numbers in your project.
SignalWire Message Logs API
Endpoints related to accessing message logs
SignalWire Message Media API
Manage media files attached to messages.
SignalWire Messages API
Send and manage SMS/MMS messages.
SignalWire Messaging Webhooks API
Callbacks about a message: the SWML document request sent when a message arrives, delivery state for messages you send, and 10DLC registration state.
SignalWire Multi-Factor Authentication API
Multi-factor authentication adds security to your application by requesting a user to be verified via voice or via text message. It can also be used for One Time Password flows ...
SignalWire Number Group Membership API
Manage phone number memberships within number groups.
SignalWire Number Groups API
Manage number groups for organizing phone numbers.
SignalWire Phone Number Lookup API
Look up information about phone numbers.
SignalWire Phone Numbers API
Manage phone numbers for your SignalWire project.
SignalWire Phone Routes API
Endpoints related to managing Phone Routes
SignalWire Project Tokens API
Manage API tokens for authentication.
SignalWire Projects API
Manage projects and subprojects under the authenticated root project.
SignalWire PubSub Tokens API
Endpoints related to creating & managing PubSub Tokens
SignalWire Queue Members API
Manage members in call queues.
SignalWire Queues API
Manage call queues.
SignalWire Recording Transcriptions API
Manage transcriptions of recordings.
SignalWire Recordings API
Manage call recordings.
SignalWire Relay Application API
Endpoints related to creating & managing Relay Applications
SignalWire Resources API
Endpoints related to creating & managing Resources
SignalWire Room Recordings API
Manage room recordings
SignalWire Room Sessions API
Manage room sessions
SignalWire Room Tokens API
Manage room tokens
SignalWire Rooms API
Manage video rooms
SignalWire Short Codes API
Manage short codes for SMS and MMS messaging.
SignalWire SIP Addresses API
Endpoints related to creating & managing SIP Addresses — the SIP configuration (username, Domain, codecs, ciphers, encryption, IP authentication, registration password) for the ...
SignalWire SIP Credentials API
Manage SIP credentials for authenticating SIP endpoints.
SignalWire SIP Endpoints (Legacy) API
Manage SIP endpoints for voice communication. Use SIP Credentials for new integrations.
SignalWire SIP Gateway API
Endpoints related to creating & managing SIP Gateways
SignalWire SIP Profile API
Manage SIP profile settings.
SignalWire Space Domain Applications API
Manage domain applications for call handling configuration.
SignalWire Streams API
Manage media streams for calls.
SignalWire Subscriber SIP Credentials API
Endpoints related to creating & managing [Subscriber](/docs/platform/subscribers) SIP Endpoints.
SignalWire Subscriber Tokens API
Endpoints related to creating & managing [Subscriber](/docs/platform/subscribers) tokens.
SignalWire Subscribers API
Endpoints related to creating & managing [Subscribers](/docs/platform/subscribers).
SignalWire SWML Scripts API
Endpoints related to creating & managing SWML Scripts
SignalWire SWML Webhook API
Endpoints related to creating & managing SWML Webhooks
SignalWire Tokens API
Manage API tokens for authentication.
SignalWire Verified Caller ID API
Manage verified caller IDs for phone numbers not purchased through SignalWire.
SignalWire Video Conferences API
Manage video conferences
SignalWire Video Logs API
View video logs
SignalWire Voice Logs API
Endpoints related to accessing voice logs
SignalWire WhatsApp Businesses API
List the WhatsApp Business Accounts connected to your Space.
SignalWire WhatsApp Numbers API
List and retrieve the WhatsApp numbers connected to your Space.
SignalWire WhatsApp Templates API
Create and manage the Meta-approved templates required to start WhatsApp conversations.
Scroll within the panel for all 80 ·
MCP Servers 1
Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.
Model Context Protocol servers that expose these APIs to AI agents.
SignalWire Documentation MCP Server
MCP SERVERPricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Signalwire Rate Limits
RATE LIMITSEvent Specifications 1
Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Signalwire Webhooks
ASYNCAPIJSON Schema 1
Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.
Standalone JSON Schema definitions for this provider's data models.
SWML Object
JSON SCHEMASecurity Posture 4
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for SignalWire — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 5
Portal, sign-up, and the first successful call
Documentation 3
Reference material describing how the API behaves
Agent Surfaces 4
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 7
Pagination, idempotency, versioning, errors, and events
Scroll within the panel for all 7 ·
Build 6
SDKs, sample code, and the tooling you integrate with
Access & Security 5
Authentication, authorization, and security posture
Operate 4
Status, limits, changes, and where to get help
Commercial 4
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
Other 4
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/signalwire · machine-readable index on apis.io
This is an independent, third-party profile of SignalWire, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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