Bandwidth

Bandwidth is a leading cloud-based communications platform providing voice, messaging, emergency calling, phone number management, multi-factor authentication, and toll-free verification APIs. Built on Bandwidth's own Tier 1 network, the platform delivers enterprise-grade reliability for CPaaS applications.

Bandwidth publishes 8 API contracts indexed on the APIs.io network, including Calls API, Conferences API, Emergency Notification Recipients API, and 5 more. Tagged areas include Communications, CPaaS, Voice, Messaging, and Telephony.

The Bandwidth catalog on APIs.io includes 3 event-driven AsyncAPI specifications, 1 JSON-LD context, and 4 Spectral governance rulesets.

Bandwidth’s developer surface includes pricing, changelog, getting-started guide, authentication, documentation, signup flow, engineering blog, and 47 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

60.8/100 strong ▼ -7.1 Agent 35/100 agent ready Front door AI 4/6 moderate Heartbeat 98/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

3 published contracts 5 Agent Skills 16 Features 8 Use Cases

Communications CPaaS Voice Messaging Telephony SMS MFA Telecommunications

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Telecom Regulatory Compliance Management

BC-2700

Emergency Notification RecipientsEndpointsLocations

GET /accounts/{accountId}/e911s POST /accounts/{accountId}/e911s/locations

Kin Score

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

Composite quality — 60.8/100 · strong

Contract Quality 13.6 / 19

Developer Ergonomics 6.0 / 15

Access Clarity 12.6 / 15

Operational Transparency 4.2 / 10

Contract Governance 2.9 / 9

Discoverability 6.0 / 8

Regulatory Posture 4.2 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 35/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 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 5 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 0 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Telecommunications 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 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.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Show this score on your site.

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<a href="https://apis.io/providers/bandwidth/"><img src="https://apis.io/badge/bandwidth/card.svg" alt="Bandwidth on APIs.io — Kin Score by API Evangelist"></a>

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

6 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 39.9 — up to +12.0 composite points
Contract Governance scores 31.8 — up to +8.2 composite points
Operational Transparency scores 43.4 — up to +7.4 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/bandwidth/apis.yml: open an issue on github.com/api-evangelist/bandwidth 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
Telecom Network APIs (CAMARA)	mixed	38.0	-	-
Communications (CPaaS)	mixed	38.0	-	-
Zoom App Marketplace and Partner Ecosystem (builders and partners on Zoom)	mixed	38.0	-	-

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.

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (documented)

OpenAPI

measured — observed by APIs.io (published)

APIs 8

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

Bandwidth Calls API

Create, retrieve, and manage phone calls. Supports outbound call creation, call state queries, and in-progress call modifications using BXML or redirect URLs.

Bandwidth Conferences API

Create and manage multi-party conference calls. Supports adding and removing members, muting, holding, and playing audio to conferences.

Bandwidth Emergency Notification Recipients API

Configure notification recipients who receive alerts when 911 calls are made from your endpoints.

Bandwidth Endpoints API

Manage 911 endpoints that represent end users of your service. Endpoints are identified by Alternate End User IDs (AEUIs) and are associated with locations for emergency routing.

Bandwidth Locations API

Provision and manage physical locations (addresses) for 911 emergency services routing. Locations are validated against the Master Street Address Guide (MSAG) for accuracy.

Bandwidth Media API

Upload, retrieve, and manage media files for use in MMS messages. Supports files up to 3.75 MB with 48-hour retention.

Bandwidth Messages API

Send and retrieve SMS and MMS messages. Supports single and group messaging, delivery receipts, and message history queries.

Bandwidth Recordings API

Manage call recordings including retrieval of recording metadata, audio files, and transcription of recorded audio content.

Scroll for all 8

Postman Collections 18

Ready-to-run Postman collections for exercising this provider's APIs.

Bandwidth Emergency Calling Available Numbers API

POSTMAN

Bandwidth Emergency Calling Available Numbers Calls API

POSTMAN

Bandwidth Emergency Calling Available Numbers Conferences API

POSTMAN

Bandwidth Emergency Calling Available Numbers Disconnects API

POSTMAN

Bandwidth Emergency Calling Available Numbers Emergency Notification Recipients API

POSTMAN

Bandwidth Emergency Calling Available Numbers Endpoints API

POSTMAN

Bandwidth Emergency Calling Available Numbers Locations API

POSTMAN

Bandwidth Emergency Calling Available Numbers Media API

POSTMAN

Bandwidth Emergency Calling Available Numbers Messages API

POSTMAN

Bandwidth Emergency Calling Available Numbers MFA API

POSTMAN

Bandwidth Emergency Calling Available Numbers Number Features API

POSTMAN

Bandwidth Emergency Calling Available Numbers Orders API

POSTMAN

Bandwidth Emergency Calling Available Numbers Phone Numbers API

POSTMAN

Bandwidth Emergency Calling Available Numbers Port-Ins API

POSTMAN

Bandwidth Emergency Calling Available Numbers Recordings API

POSTMAN

Bandwidth Emergency Calling Available Numbers SIP Peers API

POSTMAN

Bandwidth Emergency Calling Available Numbers Sites API

POSTMAN

Bandwidth Emergency Calling Available Numbers Toll-Free Verification API

POSTMAN

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Open Collections 21

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

Bandwidth Emergency Calling Available Numbers API

OPEN COLLECTION

Bandwidth Emergency Calling Available Numbers Calls API

OPEN COLLECTION

Bandwidth Emergency Calling Available Numbers Conferences API

OPEN COLLECTION

Bandwidth Emergency Calling Available Numbers Disconnects API

OPEN COLLECTION

Bandwidth Emergency Calling API

OPEN COLLECTION

Bandwidth Emergency Calling Available Numbers Emergency Notification Recipients API

OPEN COLLECTION

Bandwidth Emergency Calling Available Numbers Endpoints API

OPEN COLLECTION

Bandwidth Emergency Calling Available Numbers Locations API

OPEN COLLECTION

Bandwidth Emergency Calling Available Numbers Media API

OPEN COLLECTION

Bandwidth Emergency Calling Available Numbers Messages API

OPEN COLLECTION

Bandwidth Messaging API

OPEN COLLECTION

Bandwidth Emergency Calling Available Numbers MFA API

OPEN COLLECTION

Bandwidth Emergency Calling Available Numbers Number Features API

OPEN COLLECTION

Bandwidth Emergency Calling Available Numbers Orders API

OPEN COLLECTION

Bandwidth Emergency Calling Available Numbers Phone Numbers API

OPEN COLLECTION

Bandwidth Emergency Calling Available Numbers Port-Ins API

OPEN COLLECTION

Bandwidth Emergency Calling Available Numbers Recordings API

OPEN COLLECTION

Bandwidth Emergency Calling Available Numbers SIP Peers API

OPEN COLLECTION

Bandwidth Emergency Calling Available Numbers Sites API

OPEN COLLECTION

Bandwidth Emergency Calling Available Numbers Toll-Free Verification API

OPEN COLLECTION

Bandwidth Voice API

OPEN COLLECTION

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Agent Skills 5

Packaged agent skills for driving this provider's APIs from an AI assistant.

bandwidth-create-call

AGENT SKILL

bandwidth-manage-conferences

AGENT SKILL

bandwidth-manage-e911-endpoint

AGENT SKILL

bandwidth-recordings-download-and-transcribe

AGENT SKILL

bandwidth-send-and-list-messages

AGENT SKILL

Bandwidth API pricing

Prices published by Bandwidth, read 2026-10-28 from www.bandwidth.com/pricing/.

Plan	Price
U.S. 10DLC SMS outbound	$0.004 per message
U.S. 10DLC MMS outbound	$0.015 per message
U.S. Short code SMS outbound	$0.008 per message
U.S. Short code MMS outbound	$0.020 per message
U.S. Toll-free SMS outbound	$0.007 per message
U.S. local outbound voice	$0.0100 per minute
U.S. local inbound voice	$0.0055 per minute
Standard text-to-speech	$0.0007 per 100 char.

All 20 plans, limits and sources →

Rate limits

Messaging API (default): 10 messages per second
Voice API: 10 calls per second
Concurrent calls: configurable per account concurrent

Compiled by API Evangelist, not yet checked against Bandwidth's documentation. Rate-limit details →

Billed by: minute · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Bandwidth Plans Pricing

20 plans

PLANS

Bandwidth Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Bandwidth Rate Limits

3 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Bandwidth

SLA

FinOps 1

Cost, billing, and metering signals for API financial operations.

Bandwidth Finops

FINOPS

Features 16

Notable capabilities this provider offers.

SMS 10DLC outbound: $0.004/message

MMS 10DLC outbound: $0.015/message

SMS Short Code: $0.008/msg out, MMS Short Code: $0.020

SMS Toll-free: $0.007/msg out

Voice US Local: $0.010 outbound, $0.0055 inbound per minute

Tier 1 carrier with own network and interconnects

REST API for Messaging and Voice

Default 10 messages/sec and 10 calls/sec

OAuth + API keys

Webhooks for delivery receipts and inbound events

BXML for voice IVR scripting

Verify API for OTP

Number Management API

Phone Number Insight (line-type lookup)

Iris API for porting and management

Enterprise committed-use volume contracts

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Event Specifications 3

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Bandwidth Messaging Events

Bandwidth Messaging API sends webhooks to your application for real-time message delivery notifications and inbound message alerts. Callbacks are sent via HTTP POST to the callb...

ASYNCAPI

Bandwidth Voice Events

Bandwidth Voice API sends webhooks (BXML callbacks) to your application for real-time call event notifications. These webhooks inform your application of call state changes and ...

ASYNCAPI

Bandwidth Webhooks

ASYNCAPI

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Bandwidth Context

51 classes · 137 properties

JSON-LD

Spectral Rules 4

Spectral governance rulesets for linting and validating these APIs.

Bandwidth — asyncapi rules

9 rules · 1 errors 7 warnings 1 info

SPECTRAL

Bandwidth — jsonschema rules

6 rules · 4 warnings 2 info

SPECTRAL

Bandwidth API Rules

17 rules · 15 errors 1 warnings 1 info

SPECTRAL

Bandwidth API Rules

24 rules · 9 errors 13 warnings 2 info

SPECTRAL

JSON Schema 71

Standalone JSON Schema definitions for this provider's data models.

Bandwidth Call

19 properties

JSON SCHEMA

Conference

6 properties

JSON SCHEMA

CreateCallRequest

12 properties

JSON SCHEMA

CreateMessageRequest

8 properties

JSON SCHEMA

EndpointListResponse

2 properties

JSON SCHEMA

Endpoint

6 properties

JSON SCHEMA

LocationListResponse

2 properties

JSON SCHEMA

Location

6 properties

JSON SCHEMA

Media

4 properties

JSON SCHEMA

MessageList

3 properties

JSON SCHEMA

Bandwidth Message

13 properties

JSON SCHEMA

NotificationRecipientListResponse

1 properties

JSON SCHEMA

NotificationRecipient

4 properties

JSON SCHEMA

Bandwidth Phone Number

9 properties

JSON SCHEMA

Recording

12 properties

JSON SCHEMA

TranscriptionRequest

3 properties

JSON SCHEMA

Transcription

4 properties

JSON SCHEMA

UpdateCallRequest

6 properties

JSON SCHEMA

UpdateConferenceMemberRequest

3 properties

JSON SCHEMA

UpdateConferenceRequest

4 properties

JSON SCHEMA

EndpointListResponse

2 properties

JSON SCHEMA

Endpoint

6 properties

JSON SCHEMA

LocationListResponse

2 properties

JSON SCHEMA

Location

6 properties

JSON SCHEMA

NotificationRecipientListResponse

1 properties

JSON SCHEMA

NotificationRecipient

4 properties

JSON SCHEMA

CreateMessageRequest

8 properties

JSON SCHEMA

Error

3 properties

JSON SCHEMA

Media

4 properties

JSON SCHEMA

MessageList

3 properties

JSON SCHEMA

Message

12 properties

JSON SCHEMA

Error

2 properties

JSON SCHEMA

MfaMessagingRequest

7 properties

JSON SCHEMA

MfaMessagingResponse

1 properties

JSON SCHEMA

MfaVerifyRequest

4 properties

JSON SCHEMA

MfaVerifyResponse

1 properties

JSON SCHEMA

MfaVoiceRequest

7 properties

JSON SCHEMA

MfaVoiceResponse

1 properties

JSON SCHEMA

Address

6 properties

JSON SCHEMA

AvailableNumber

5 properties

JSON SCHEMA

AvailableNumbersResponse

2 properties

JSON SCHEMA

DisconnectRequest

2 properties

JSON SCHEMA

DisconnectResponse

2 properties

JSON SCHEMA

FeatureOrderRequest

2 properties

JSON SCHEMA

OrderListResponse

2 properties

JSON SCHEMA

OrderRequest

4 properties

JSON SCHEMA

OrderResponse

6 properties

JSON SCHEMA

PhoneNumberListResponse

2 properties

JSON SCHEMA

PhoneNumber

8 properties

JSON SCHEMA

PortInListResponse

2 properties

JSON SCHEMA

PortInRequest

7 properties

JSON SCHEMA

PortInResponse

4 properties

JSON SCHEMA

SipPeerListResponse

1 properties

JSON SCHEMA

SipPeer

4 properties

JSON SCHEMA

SiteListResponse

1 properties

JSON SCHEMA

Site

4 properties

JSON SCHEMA

Error

2 properties

JSON SCHEMA

VerificationListResponse

2 properties

JSON SCHEMA

VerificationRequest

11 properties

JSON SCHEMA

Verification

8 properties

JSON SCHEMA

Call

13 properties

JSON SCHEMA

ConferenceMember

6 properties

JSON SCHEMA

Conference

6 properties

JSON SCHEMA

CreateCallRequest

12 properties

JSON SCHEMA

Error

3 properties

JSON SCHEMA

Recording

12 properties

JSON SCHEMA

TranscriptionRequest

3 properties

JSON SCHEMA

Transcription

4 properties

JSON SCHEMA

UpdateCallRequest

6 properties

JSON SCHEMA

UpdateConferenceMemberRequest

3 properties

JSON SCHEMA

UpdateConferenceRequest

4 properties

JSON SCHEMA

Scroll for all 71

JSON Structure 54

JSON Structure definitions describing this provider's data shapes.

Bandwidth Call Structure

19 properties

JSON STRUCTURE

Bandwidth Message Structure

13 properties

JSON STRUCTURE

Bandwidth Phone Number Structure

9 properties

JSON STRUCTURE

Emergency Calling Endpoint List Response Structure

2 properties

JSON STRUCTURE

Emergency Calling Endpoint Structure

6 properties

JSON STRUCTURE

Emergency Calling Location List Response Structure

2 properties

JSON STRUCTURE

Emergency Calling Location Structure

6 properties

JSON STRUCTURE

Emergency Calling Notification Recipient List Response Structure

1 properties

JSON STRUCTURE

Emergency Calling Notification Recipient Structure

4 properties

JSON STRUCTURE

Messaging Create Message Request Structure

8 properties

JSON STRUCTURE

Messaging Error Structure

3 properties

JSON STRUCTURE

Messaging Media Structure

4 properties

JSON STRUCTURE

Messaging Message List Structure

3 properties

JSON STRUCTURE

Messaging Message Structure

12 properties

JSON STRUCTURE

Mfa Error Structure

2 properties

JSON STRUCTURE

Mfa Mfa Messaging Request Structure

7 properties

JSON STRUCTURE

Mfa Mfa Messaging Response Structure

1 properties

JSON STRUCTURE

Mfa Mfa Verify Request Structure

4 properties

JSON STRUCTURE

Mfa Mfa Verify Response Structure

1 properties

JSON STRUCTURE

Mfa Mfa Voice Request Structure

7 properties

JSON STRUCTURE

Mfa Mfa Voice Response Structure

1 properties

JSON STRUCTURE

Phone Numbers Address Structure

6 properties

JSON STRUCTURE

Phone Numbers Available Number Structure

5 properties

JSON STRUCTURE

Phone Numbers Available Numbers Response Structure

2 properties

JSON STRUCTURE

Phone Numbers Disconnect Request Structure

2 properties

JSON STRUCTURE

Phone Numbers Disconnect Response Structure

2 properties

JSON STRUCTURE

Phone Numbers Feature Order Request Structure

2 properties

JSON STRUCTURE

Phone Numbers Order List Response Structure

2 properties

JSON STRUCTURE

Phone Numbers Order Request Structure

4 properties

JSON STRUCTURE

Phone Numbers Order Response Structure

6 properties

JSON STRUCTURE

Phone Numbers Phone Number List Response Structure

2 properties

JSON STRUCTURE

Phone Numbers Phone Number Structure

8 properties

JSON STRUCTURE

Phone Numbers Port In List Response Structure

2 properties

JSON STRUCTURE

Phone Numbers Port In Request Structure

7 properties

JSON STRUCTURE

Phone Numbers Port In Response Structure

4 properties

JSON STRUCTURE

Phone Numbers Sip Peer List Response Structure

1 properties

JSON STRUCTURE

Phone Numbers Sip Peer Structure

4 properties

JSON STRUCTURE

Phone Numbers Site List Response Structure

1 properties

JSON STRUCTURE

Phone Numbers Site Structure

4 properties

JSON STRUCTURE

Toll Free Verification Error Structure

2 properties

JSON STRUCTURE

Toll Free Verification Verification List Response Structure

2 properties

JSON STRUCTURE

Toll Free Verification Verification Request Structure

11 properties

JSON STRUCTURE

Toll Free Verification Verification Structure

8 properties

JSON STRUCTURE

Voice Call Structure

13 properties

JSON STRUCTURE

Voice Conference Member Structure

6 properties

JSON STRUCTURE

Voice Conference Structure

6 properties

JSON STRUCTURE

Voice Create Call Request Structure

12 properties

JSON STRUCTURE

Voice Error Structure

3 properties

JSON STRUCTURE

Voice Recording Structure

12 properties

JSON STRUCTURE

Voice Transcription Request Structure

3 properties

JSON STRUCTURE

Voice Transcription Structure

4 properties

JSON STRUCTURE

Voice Update Call Request Structure

6 properties

JSON STRUCTURE

Voice Update Conference Member Request Structure

3 properties

JSON STRUCTURE

Voice Update Conference Request Structure

4 properties

JSON STRUCTURE

Scroll for all 54

Examples 54

Example request and response payloads for these APIs.

Bandwidth Call Example

19 fields

EXAMPLE

Bandwidth Message Example

13 fields

EXAMPLE

Bandwidth Phone Number Example

9 fields

EXAMPLE

Emergency Calling Endpoint Example

6 fields

EXAMPLE

Emergency Calling Endpoint List Response Example

2 fields

EXAMPLE

Emergency Calling Location Example

6 fields

EXAMPLE

Emergency Calling Location List Response Example

2 fields

EXAMPLE

Emergency Calling Notification Recipient Example

4 fields

EXAMPLE

Emergency Calling Notification Recipient List Response Example

1 fields

EXAMPLE

Messaging Create Message Request Example

8 fields

EXAMPLE

Messaging Error Example

3 fields

EXAMPLE

Messaging Media Example

4 fields

EXAMPLE

Messaging Message Example

12 fields

EXAMPLE

Messaging Message List Example

3 fields

EXAMPLE

Mfa Error Example

2 fields

EXAMPLE

Mfa Mfa Messaging Request Example

7 fields

EXAMPLE

Mfa Mfa Messaging Response Example

1 fields

EXAMPLE

Mfa Mfa Verify Request Example

4 fields

EXAMPLE

Mfa Mfa Verify Response Example

1 fields

EXAMPLE

Mfa Mfa Voice Request Example

7 fields

EXAMPLE

Mfa Mfa Voice Response Example

1 fields

EXAMPLE

Phone Numbers Address Example

6 fields

EXAMPLE

Phone Numbers Available Number Example

5 fields

EXAMPLE

Phone Numbers Available Numbers Response Example

2 fields

EXAMPLE

Phone Numbers Disconnect Request Example

2 fields

EXAMPLE

Phone Numbers Disconnect Response Example

2 fields

EXAMPLE

Phone Numbers Feature Order Request Example

2 fields

EXAMPLE

Phone Numbers Order List Response Example

2 fields

EXAMPLE

Phone Numbers Order Request Example

4 fields

EXAMPLE

Phone Numbers Order Response Example

6 fields

EXAMPLE

Phone Numbers Phone Number Example

8 fields

EXAMPLE

Phone Numbers Phone Number List Response Example

2 fields

EXAMPLE

Phone Numbers Port In List Response Example

2 fields

EXAMPLE

Phone Numbers Port In Request Example

7 fields

EXAMPLE

Phone Numbers Port In Response Example

4 fields

EXAMPLE

Phone Numbers Sip Peer Example

4 fields

EXAMPLE

Phone Numbers Sip Peer List Response Example

1 fields

EXAMPLE

Phone Numbers Site Example

4 fields

EXAMPLE

Phone Numbers Site List Response Example

1 fields

EXAMPLE

Toll Free Verification Error Example

2 fields

EXAMPLE

Toll Free Verification Verification Example

8 fields

EXAMPLE

Toll Free Verification Verification List Response Example

2 fields

EXAMPLE

Toll Free Verification Verification Request Example

11 fields

EXAMPLE

Voice Call Example

13 fields

EXAMPLE

Voice Conference Example

6 fields

EXAMPLE

Voice Conference Member Example

6 fields

EXAMPLE

Voice Create Call Request Example

12 fields

EXAMPLE

Voice Error Example

3 fields

EXAMPLE

Voice Recording Example

12 fields

EXAMPLE

Voice Transcription Example

4 fields

EXAMPLE

Voice Transcription Request Example

3 fields

EXAMPLE

Voice Update Call Request Example

6 fields

EXAMPLE

Voice Update Conference Member Request Example

3 fields

EXAMPLE

Voice Update Conference Request Example

4 fields

EXAMPLE

Scroll for all 54

Security Posture 4

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

Bandwidth Authentication

http · 1 scheme

SECURITY

Bandwidth Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Bandwidth Vulnerability Disclosure

no policy recorded

SECURITY

Bandwidth Trust Center

SOC 2, ISO 27001, HIPAA, GDPR

SECURITY

Agentic Access 1

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

Bandwidth Agentic Access

62 operations · 31 acting · 1 human-in-the-loop

62 operations · 31 acting

AGENTIC

Use Cases 8

What developers build with this provider.

Click-to-Call

Embed outbound calling in web and mobile applications.

IVR Systems

Build interactive voice response menus with DTMF input and TTS.

A2P Messaging

Send application-to-person SMS campaigns at scale.

2FA / OTP

Add SMS or voice-based multi-factor authentication to applications.

Number Provisioning

Automate phone number procurement and assignment for customers.

E911 Compliance

Meet Kari's Law and RAY BAUM's Act requirements for enterprise voice.

Call Center

Build inbound/outbound contact center applications with recording.

Number Porting

Migrate existing phone numbers to Bandwidth programmatically.

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Resources

Get Started 3

Portal, sign-up, and the first successful call

Login

GettingStarted

GettingStarted

Signup

Signup

Documentation 4

Reference material describing how the API behaves

Documentation

JSONSchema

JSONSchema

JSONSchema

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

LLMsTxt

WellKnown

AgenticAccess

LlmsText

Design & Contract 13

Pagination, idempotency, versioning, errors, and events

Spectral

Spectral

Spectral

Spectral

Vocabulary

Webhooks

DataModel

ErrorCatalog

Conformance

Webhooks

SpectralRules

Vocabulary

JSONLD

Scroll for all 13

Build 4

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Packages

Packages

PostmanWorkspace

PostmanWorkspace

GitHubOrganization

GitHubOrganization

Access & Security 8

Authentication, authorization, and security posture

Compliance

SecurityTxt

SecurityTxt

Security

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Scroll for all 8

Operate 4

Status, limits, changes, and where to get help

RateLimits

ChangeLog

StatusPage

Support

Commercial 5

Pricing, plans, and the legal terms of use

FinOps

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 4

The organization behind the API

Newsroom

Newsroom

LinkedIn

Website

Website

Blog

Blog

Other 4

Properties that don't map to a standard resource type

Hosts

Vendors

Leadership

CapabilityMap

Source (apis.yml)

aid: bandwidth
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: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/bandwidth.png
url: https://raw.githubusercontent.com/api-evangelist/bandwidth/refs/heads/main/apis.yml
name: Bandwidth
x-docs-platform: docusaurus
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-09-20
tags:
- Communications
- CPaaS
- Voice
- Messaging
- Telephony
- SMS
- MFA
- Telecommunications
modified: '2026-05-19'
description: Bandwidth is a leading cloud-based communications platform providing voice, messaging, emergency calling, phone
  number management, multi-factor authentication, and toll-free verification APIs. Built on Bandwidth's own Tier 1 network,
  the platform delivers enterprise-grade reliability for CPaaS applications.
created: '2024-01-01'
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
specificationVersion: '0.23'
common:
- type: FinOps
  url: finops/bandwidth-finops.yml
- type: RateLimits
  url: rate-limits/bandwidth-rate-limits.yml
- type: Plans
  url: plans/bandwidth-plans-pricing.yml
- type: Spectral
  url: rules/bandwidth-spectral-rules.yml
- type: Spectral
  url: rules/bandwidth-rules.yml
- type: Spectral
  url: rules/bandwidth-jsonschema-spectral-rules.yml
- type: Spectral
  url: rules/bandwidth-asyncapi-spectral-rules.yml
- type: Vocabulary
  url: vocabulary/bandwidth-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Webhooks
  url: asyncapi/bandwidth-webhooks.yml
- type: DataModel
  url: data-model/bandwidth-data-model.yml
- type: Compliance
  url: https://www.bandwidth.com/security/
- type: ErrorCatalog
  url: errors/bandwidth-problem-types.yml
- type: Conformance
  url: conformance/bandwidth-conformance.yml
- type: LLMsTxt
  url: llms/bandwidth-llms.txt
- type: SecurityTxt
  url: well-known/bandwidth-status-security.txt
- type: SecurityTxt
  url: well-known/bandwidth-community-security.txt
- type: WellKnown
  url: well-known/bandwidth-well-known.yml
- type: Hosts
  url: hosts/bandwidth-hosts.yml
- type: Vendors
  url: vendors/bandwidth-vendors.yml
- type: SDKs
  url: packages/bandwidth-packages.yml
- type: Packages
  url: packages/bandwidth-packages.yml
- type: Webhooks
  url: https://www.bandwidth.com/glossary/webhook/
- type: Security
  url: https://www.bandwidth.com/security/
- type: Pricing
  url: https://www.bandwidth.com/pricing/
- type: Newsroom
  url: https://www.bandwidth.com/newsroom/
- type: Login
  url: https://community.bandwidth.com/login
- type: Leadership
  url: https://www.bandwidth.com/leadership/
- type: ChangeLog
  url: https://www.bandwidth.com/release-notes/
- type: GettingStarted
  url: https://dev.bandwidth.com/docs/voice/programmable-voice/build-free-trial
- type: CapabilityMap
  url: capabilities/bandwidth-capability-edges.yml
  name: Bandwidth Business Capability Map
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/bandwidth/overview
- type: AgenticAccess
  url: agentic-access/bandwidth-agentic-access.yml
- type: TrustCenter
  url: security/bandwidth-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/bandwidth-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/bandwidth-domain-security.yml
- type: Authentication
  url: authentication/bandwidth-authentication.yml
- type: GitHubOrganization
  url: https://github.com/Bandwidth
- type: LinkedIn
  url: https://www.linkedin.com/company/bandwidth-inc
- type: Website
  url: https://www.bandwidth.com/
  name: Bandwidth
- type: Documentation
  url: https://dev.bandwidth.com/
  name: Bandwidth Developer Portal
- type: Signup
  url: https://app.bandwidth.com/signup
  name: Sign Up for Bandwidth
- type: Blog
  url: https://www.bandwidth.com/blog/
  name: Bandwidth Blog
- type: TermsOfService
  url: https://www.bandwidth.com/legal/
  name: Terms of Service
- type: PrivacyPolicy
  url: https://www.bandwidth.com/legal/privacy-policy/
  name: Privacy Policy
- type: StatusPage
  url: https://status.bandwidth.com/
  name: Bandwidth System Status
- type: Support
  url: https://support.bandwidth.com/
  name: Bandwidth Support
- type: SpectralRules
  url: rules/bandwidth-spectral-rules.yml
- type: Vocabulary
  url: vocabulary/bandwidth-vocabulary.yaml
- type: JSONSchema
  url: json-schema/bandwidth-call-schema.json
- type: JSONSchema
  url: json-schema/bandwidth-message-schema.json
- type: JSONSchema
  url: json-schema/bandwidth-phone-number-schema.json
- type: JSONLD
  url: json-ld/bandwidth-context.jsonld
- name: Features
  type: Features
  data:
  - 'SMS 10DLC outbound: $0.004/message'
  - 'MMS 10DLC outbound: $0.015/message'
  - 'SMS Short Code: $0.008/msg out, MMS Short Code: $0.020'
  - 'SMS Toll-free: $0.007/msg out'
  - 'Voice US Local: $0.010 outbound, $0.0055 inbound per minute'
  - Tier 1 carrier with own network and interconnects
  - REST API for Messaging and Voice
  - Default 10 messages/sec and 10 calls/sec
  - OAuth + API keys
  - Webhooks for delivery receipts and inbound events
  - BXML for voice IVR scripting
  - Verify API for OTP
  - Number Management API
  - Phone Number Insight (line-type lookup)
  - Iris API for porting and management
  - Enterprise committed-use volume contracts
  sources:
  - https://www.bandwidth.com/pricing/
  updated: '2026-05-04'
- name: Use Cases
  type: UseCases
  data:
  - name: Click-to-Call
    description: Embed outbound calling in web and mobile applications.
  - name: IVR Systems
    description: Build interactive voice response menus with DTMF input and TTS.
  - name: A2P Messaging
    description: Send application-to-person SMS campaigns at scale.
  - name: 2FA / OTP
    description: Add SMS or voice-based multi-factor authentication to applications.
  - name: Number Provisioning
    description: Automate phone number procurement and assignment for customers.
  - name: E911 Compliance
    description: Meet Kari's Law and RAY BAUM's Act requirements for enterprise voice.
  - name: Call Center
    description: Build inbound/outbound contact center applications with recording.
  - name: Number Porting
    description: Migrate existing phone numbers to Bandwidth programmatically.
- name: Integrations
  type: Integrations
  data:
  - name: Cisco Webex
  - name: Microsoft Teams
  - name: Zoom Phone
  - name: Twilio
  - name: Salesforce
  - name: Amazon Connect
  - name: Genesys Cloud
- type: Integrations
  url: https://www.bandwidth.com/integrations/
- type: LlmsText
  url: https://dev.bandwidth.com/llms.txt
apis:
- aid: bandwidth:bandwidth-calls-api
  name: Bandwidth Calls API
  description: Create, retrieve, and manage phone calls. Supports outbound call creation, call state queries, and in-progress
    call modifications using BXML or redirect URLs.
  humanURL: https://dev.bandwidth.com/docs/voice/
  baseURL: https://voice.bandwidth.com/api/v2
  tags:
  - Calls
  properties:
  - type: OpenAPI
    url: openapi/bandwidth-calls-api-openapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/voice/
  - type: AsyncAPI
    url: asyncapi/bandwidth-voice-events-asyncapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/messaging/
  - type: AsyncAPI
    url: asyncapi/bandwidth-messaging-events-asyncapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/emergency/emergencyCallingApi/
  - type: JSONSchema
    url: json-schema/bandwidth-create-call-request-schema.json
  - type: JSONSchema
    url: json-schema/bandwidth-call-schema.json
  - type: JSONSchema
    url: json-schema/bandwidth-update-call-request-schema.json
- aid: bandwidth:bandwidth-conferences-api
  name: Bandwidth Conferences API
  description: Create and manage multi-party conference calls. Supports adding and removing members, muting, holding, and
    playing audio to conferences.
  humanURL: https://dev.bandwidth.com/docs/voice/
  baseURL: https://voice.bandwidth.com/api/v2
  tags:
  - Conferences
  properties:
  - type: OpenAPI
    url: openapi/bandwidth-conferences-api-openapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/voice/
  - type: AsyncAPI
    url: asyncapi/bandwidth-voice-events-asyncapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/messaging/
  - type: AsyncAPI
    url: asyncapi/bandwidth-messaging-events-asyncapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/emergency/emergencyCallingApi/
  - type: JSONSchema
    url: json-schema/bandwidth-recording-schema.json
  - type: JSONSchema
    url: json-schema/bandwidth-conference-schema.json
  - type: JSONSchema
    url: json-schema/bandwidth-update-conference-request-schema.json
  - type: JSONSchema
    url: json-schema/bandwidth-update-conference-member-request-schema.json
- aid: bandwidth:bandwidth-emergency-notification-recipients-api
  name: Bandwidth Emergency Notification Recipients API
  description: Configure notification recipients who receive alerts when 911 calls are made from your endpoints.
  humanURL: https://dev.bandwidth.com/docs/voice/
  baseURL: https://voice.bandwidth.com/api/v2
  tags:
  - Emergency Notification Recipients
  properties:
  - type: OpenAPI
    url: openapi/bandwidth-emergency-notification-recipients-api-openapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/voice/
  - type: AsyncAPI
    url: asyncapi/bandwidth-voice-events-asyncapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/messaging/
  - type: AsyncAPI
    url: asyncapi/bandwidth-messaging-events-asyncapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/emergency/emergencyCallingApi/
  - type: JSONSchema
    url: json-schema/bandwidth-notification-recipient-schema.json
  - type: JSONSchema
    url: json-schema/bandwidth-notification-recipient-list-response-schema.json
- aid: bandwidth:bandwidth-endpoints-api
  name: Bandwidth Endpoints API
  description: Manage 911 endpoints that represent end users of your service. Endpoints are identified by Alternate End User
    IDs (AEUIs) and are associated with locations for emergency routing.
  humanURL: https://dev.bandwidth.com/docs/voice/
  baseURL: https://voice.bandwidth.com/api/v2
  tags: []
  tags_raw:
  - Endpoints
  properties:
  - type: OpenAPI
    url: openapi/bandwidth-endpoints-api-openapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/voice/
  - type: AsyncAPI
    url: asyncapi/bandwidth-voice-events-asyncapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/messaging/
  - type: AsyncAPI
    url: asyncapi/bandwidth-messaging-events-asyncapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/emergency/emergencyCallingApi/
  - type: JSONSchema
    url: json-schema/bandwidth-endpoint-schema.json
  - type: JSONSchema
    url: json-schema/bandwidth-endpoint-list-response-schema.json
- aid: bandwidth:bandwidth-locations-api
  name: Bandwidth Locations API
  description: Provision and manage physical locations (addresses) for 911 emergency services routing. Locations are validated
    against the Master Street Address Guide (MSAG) for accuracy.
  humanURL: https://dev.bandwidth.com/docs/voice/
  baseURL: https://voice.bandwidth.com/api/v2
  tags:
  - Location
  tags_raw:
  - Locations
  properties:
  - type: OpenAPI
    url: openapi/bandwidth-locations-api-openapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/voice/
  - type: AsyncAPI
    url: asyncapi/bandwidth-voice-events-asyncapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/messaging/
  - type: AsyncAPI
    url: asyncapi/bandwidth-messaging-events-asyncapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/emergency/emergencyCallingApi/
  - type: JSONSchema
    url: json-schema/bandwidth-location-schema.json
  - type: JSONSchema
    url: json-schema/bandwidth-location-list-response-schema.json
- aid: bandwidth:bandwidth-media-api
  name: Bandwidth Media API
  description: Upload, retrieve, and manage media files for use in MMS messages. Supports files up to 3.75 MB with 48-hour
    retention.
  humanURL: https://dev.bandwidth.com/docs/voice/
  baseURL: https://voice.bandwidth.com/api/v2
  tags:
  - Media
  properties:
  - type: OpenAPI
    url: openapi/bandwidth-media-api-openapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/voice/
  - type: AsyncAPI
    url: asyncapi/bandwidth-voice-events-asyncapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/messaging/
  - type: AsyncAPI
    url: asyncapi/bandwidth-messaging-events-asyncapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/emergency/emergencyCallingApi/
  - type: JSONSchema
    url: json-schema/bandwidth-media-schema.json
- aid: bandwidth:bandwidth-messages-api
  name: Bandwidth Messages API
  description: Send and retrieve SMS and MMS messages. Supports single and group messaging, delivery receipts, and message
    history queries.
  humanURL: https://dev.bandwidth.com/docs/voice/
  baseURL: https://voice.bandwidth.com/api/v2
  tags:
  - Message
  tags_raw:
  - Messages
  properties:
  - type: OpenAPI
    url: openapi/bandwidth-messages-api-openapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/voice/
  - type: AsyncAPI
    url: asyncapi/bandwidth-voice-events-asyncapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/messaging/
  - type: AsyncAPI
    url: asyncapi/bandwidth-messaging-events-asyncapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/emergency/emergencyCallingApi/
  - type: JSONSchema
    url: json-schema/bandwidth-create-message-request-schema.json
  - type: JSONSchema
    url: json-schema/bandwidth-message-schema.json
  - type: JSONSchema
    url: json-schema/bandwidth-message-list-schema.json
- aid: bandwidth:bandwidth-recordings-api
  name: Bandwidth Recordings API
  description: Manage call recordings including retrieval of recording metadata, audio files, and transcription of recorded
    audio content.
  humanURL: https://dev.bandwidth.com/docs/voice/
  baseURL: https://voice.bandwidth.com/api/v2
  tags:
  - Recording
  tags_raw:
  - Recordings
  properties:
  - type: OpenAPI
    url: openapi/bandwidth-recordings-api-openapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/voice/
  - type: AsyncAPI
    url: asyncapi/bandwidth-voice-events-asyncapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/messaging/
  - type: AsyncAPI
    url: asyncapi/bandwidth-messaging-events-asyncapi.yml
  - type: Documentation
    url: https://dev.bandwidth.com/docs/emergency/emergencyCallingApi/
  - type: JSONSchema
    url: json-schema/bandwidth-recording-schema.json
  - type: JSONSchema
    url: json-schema/bandwidth-transcription-schema.json
  - type: JSONSchema
    url: json-schema/bandwidth-transcription-request-schema.json
integrations:
- name: Microsoft Teams
- name: Operator Connect
- name: Genesys Cloud CX
- name: Webex Calling
- name: Zoom Phone
- name: Google Voice SIP Link
- name: Five9
- name: Pindrop
x-enrichment:
  date: '2026-10-04'
  status: enriched
  artifacts_added: 42
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Bandwidth API — frequently asked questions

Does Bandwidth have an API?

Yes. APIs.io lists 8 APIs from Bandwidth, including Bandwidth Calls API, Bandwidth Conferences API and Bandwidth Emergency Notification Recipients API, and 5 more.

Is there an OpenAPI specification for the Bandwidth API?

Yes. APIs.io indexes 8 OpenAPI specifications for Bandwidth, each linked for download from this page.

How do I authenticate with the Bandwidth API?

Bandwidth documents its authentication (http · 1 scheme). The details are profiled on APIs.io as Bandwidth Authentication.

How much does the Bandwidth API cost?

Bandwidth publishes its prices; its U.S. 10DLC SMS outbound plan is $0.004 per message as of 2026-10-28. APIs.io lists 20 pricing plans for Bandwidth, with each plan's price, limits and inclusions under Pricing on this page.

Is the Bandwidth API ready for AI agents?

Bandwidth has a Kin Score of 60.8 out of 100 (strong) and an Agent Readiness score of 34.8 (agent-ready), scored by API Evangelist on 2026-11-06.

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