Bandwidth Messaging API

Best for: AI agents and automation - an agent-ready surface (MCP / llms.txt); Cost-sensitive teams - low, transparent entry price

Avoid if: You need to start building today without contacting sales; You want to try it free before paying

• ████▒░░░░░
  45 / 100
  Agent friendliness
• ███████░░░
  70 / 100
  Pricing transparency
• ██▒░░░░░░░
  25 / 100
  Setup speed
• ████▒░░░░░
  45 / 100
  Docs quality
• ███░░░░░░░
  30 / 100
  Procurement ease
• █████████░
  90 / 100
  Trust readiness

Scores are computed deterministically from this profile's published, sourced fields (pricing, compliance, capabilities, docs and developer-surface signals) - not from reviews or paid placement. Each axis is 0-100; an unknown signal scores 0 for that axis. Procurement ease is the inverse of buying friction (higher = easier to adopt).

Pricing model

Hybrid (base + usage) [2]bandwidth.com/pricing/“Messaging starting at $0.004 per message”

Published pricing

✓ Yes [3]bandwidth.com/pricing/“Messaging starting at $0.004 per message”

Free tier

✗ No [4]bandwidth.com/pricing/“Messaging starting at $0.004 per message”

Free tier details

Do you offer a free SMS API? No. [5]bandwidth.com/pricing/“Messaging starting at $0.004 per message”

Self-serve signup

✗ No [6]bandwidth.com/messaging/“Start your trial today!”bandwidth.com/products/messaging-apis/“Start your trial today!”

Requires sales call

✓ Yes [7]bandwidth.com/messaging/“Start your trial today!”bandwidth.com/products/messaging-apis/“Start your trial today!”

Enterprise plan

✗ No [8]bandwidth.com/customer-success-plans/“Bandwidth offers success plans tailored to every stage of your growth.”

Minimum commitment

12-month initial Services Term per Communications Services Agreement, unless otherwise set forth in the Order Form [9]bandwidth.com/legal/communications-services-agreement/

Supported actions

create_message, list_messages, upload_media, get_media, list_media, delete_media, create_multi_channel_message [10]dev.bandwidth.com/apis/messaging-apis/messaging/“Authentication, Media, and Messages. Everything you'll need to start working with our Messaging API.”dev.bandwidth.com/docs/messaging/createMessage/“Sending a text message is as simple as making an API POST request to Bandwidth's messaging API”

Regions

United States, Canada, International A2P reach to 119+ countries [11]bandwidth.com/support/en/articles/12823118-does-bandwidth-support-international-sms-messaging“Bandwidth also supports 119 countries for 1-way A2P SMS and we are expanding our country coverage for 2-way A2P”bandwidth.com/glossary/international-messaging/“Bandwidth offers local and toll-free numbers for North America only, but can deliver messages worldwide”bandwidth.com/products/global-messaging/“Send messages that matter to your audience, anywhere. Global SMS and MMS from Bandwidth includes Alphanumeric and Global 2-Way Messaging.”

Input types

application/json, image/gif, image/jpeg, image/png, audio/*, video/*, text/vcard, application/pdf [12]dev.bandwidth.com/apis/messaging-apis/messaging/“Authentication, Media, and Messages. Everything you'll need to start working with our Messaging API.”dev.bandwidth.com/docs/messaging/“Base API URL https://messaging.bandwidth.com/api/v2/users/{accountId}”

Output types

application/json, application/octet-stream [13]dev.bandwidth.com/apis/messaging-apis/messaging/“Authentication, Media, and Messages. Everything you'll need to start working with our Messaging API.”dev.bandwidth.com/docs/messaging/“Base API URL https://messaging.bandwidth.com/api/v2/users/{accountId}”

Webhooks

✓ Yes [14]dev.bandwidth.com/docs/messaging/errors/“The Bandwidth Messaging API will report delivery outbound errors via Webhooks and message creation errors via the HTTP status codes.”dev.bandwidth.com/docs/messaging/

Sandbox / test mode

✗ No [15]dev.bandwidth.com/apis/legacy-apis/global/v2/“You can test ordering without being charged, service activation and more. Any API calls performed through our Sandbox API can be viewed via our Sandbox Portal.”dev.bandwidth.com/apis/legacy-apis/global/“You can test ordering without being charged, service activation and more. Any API calls performed through our Sandbox API can be viewed via our Sandbox Portal.”

SDK languages

Node.js, Python, Java, C#, Ruby, PHP [16]dev.bandwidth.com/docs/tools/“Jumpstart your integration with official SDKs for Node, Python, Java, Ruby, C#, and PHP.”github.com/bandwidth“Bandwidth Python SDK.”dev.bandwidth.com/tools/“Build with our Node, Python, Java, Ruby, C#, and PHP SDKs.”

MCP server

✓ Yes [17]dev.bandwidth.com/docs/tools/mcp“The Bandwidth MCP Server package gives AI agents the tools and resources they need to interact with Bandwidth's APIs.”github.com/Bandwidth/mcp-server“Source code for the official Bandwidth Model Context Protocol (MCP) Server. This server can be used to interact with different Bandwidth APIs via an AI agent.”bandwidth.com/glossary/model-context-protocol-mcp/“Bandwidth's locally hosted MCP server allows customers to seamlessly integrate their agent of choice with Bandwidth APIs.”

SOC 2

SOC 2 Type II [18]bandwidth.com/security/“SOC 2 Type II compliant”

HIPAA

✓ Yes [19]bandwidth.com/support/en/articles/12824000-bandwidth-hipaa-and-business-associate-agreement-baa“A Business Associate Agreement (BAA) is an agreement that extends HIPAA obligations to Bandwidth as a service provider”bandwidth.com/release-notes/now-offering-a-baa-for-hipaa-eligible-channels/“Bandwidth now offers a Business Associate Addendum (BAA) for messaging and voice channels to extend HIPAA obligations to Bandwidth as a service”bandwidth.com/support/en/articles/12823993-hipaa-eligible-products-and-services“Below is a list of Bandwidth's HIPAA-eligible services currently under the scope of Bandwidth's Business Associate Agreement (BAA).”

GDPR

✓ Yes [20]bandwidth.com/security/“GDPR global regulation alignment”

ISO 27001

✓ Yes [21]bandwidth.com/security/“ISO 27001:2022 certified”investors.bandwidth.com/news-releases/news-release-details/bandwidth-achieves-comprehensive-iso-27001-certification-across“Achieves Comprehensive ISO 27001 Certification Across Global Network, APIs, People and Business Processes.”

PCI DSS

– Unknown [22]bandwidth.com/security/“ISO 27001:2022 certified. SOC 2 Type II compliant. GDPR global regulation alignment. CCPA global regulation”

Published SLA

✓ Yes [23]bandwidth.com/products/cloud-communications-platform/“99.995% network uptime, geo-redundancy, and direct PSTN connections”bandwidth.com/legal/communications-services-agreement/“Our cross-functional experts hit a >99% SLA response rate for all support tickets.”bandwidth.com/customer-success-plans/

Rate limits

3500 requests per 5 minutes per Source IP address (API endpoint limit); 60 messages per minute with queue capacity of 900 messages (account-level messaging rate limit, applied to segment count not API requests) [24]bandwidth.com/blog/breaking-down-messaging-rate-limits/“Messaging rate limits cap how many message segments per second (MPS) you can send.”dev.bandwidth.com/docs/messaging/rateLimits/

Known restrictions

Rate limits on messages are applied to segment count, not API request. This means that a 2 segment message would count as 2 messages against your rate limit., When sending Group Messages, there's a maximum of 10 participants in a Group., Messages can be blocked for a variety of reasons, including but not limited to volumetric filtering, content blocking, SHAFT violation, etc., Rejected due to shortened url - Bandwidth recommends customers obtain their own dedicated domain if shortened links are needed for their messaging campaign., The source TN is not registered to a 10DLC campaign., The total size of MMS message media/attachments exceeded the max file size supported., Media storage: free storage with 48-hour retention period; max upload size 3.75 MB., For messages destined to AT&T, messages with 10 segments or greater will be rejected. [25]dev.bandwidth.com/docs/messaging/dev.bandwidth.com/docs/messaging/rateLimits/

• Docs
• API reference
• llms.txt
• Status page

Docs rendering: static · llms.txt present

API style

rest

Base URL

https://messaging.bandwidth.com/api/v2

Version

v2

Versioning

url

Stability

ga

Auth methods

basic, oauth2

Error format

vendor-specific

Webhook signing

hmac_sha256

Rate limit

60 / minute

SDKs

• Node.js bandwidth-sdk · repo
• Python bandwidth-sdk · repo
• Java com.bandwidth.sdk:bandwidth-sdk · repo
• C# Bandwidth.Standard · repo
• Ruby bandwidth-sdk · repo
• PHP bandwidth/sdk · repo

• Auth docs
• Quickstart
• MCP server
• Webhook events
• Deprecation policy

Launched

1999-01-01

Notable customers

Google, Microsoft, Cisco, RingCentral, Zoom, Genesys, Five9, Uber, DocuSign, Salesforce

• Twilio Programmable Messaging

  One Messaging API to reliably reach 7B+ devices

  Usage · public pricing · self-serve

• Sinch SMS API

  "Simple, secure SMS API for global reach"

  Usage · public pricing · self-serve

• Bird

  The global SMS API that scales with you

  Usage · public pricing · self-serve

• Telnyx SMS API

  Carrier-grade SMS API with direct routing. No aggregator markup, no middleman margin. Programmable messaging on infrastructure Telnyx owns end-to-end.

  Usage · public pricing · self-serve

• Infobip SMS API

  Send business text messages with a leading SMS service provider

  Usage · public pricing · self-serve

• Vonage SMS API

  Our SMS API helps you create customer journeys through conversations - even within the context of your app.

  Usage · public pricing · self-serve

Bandwidth Messaging API alternatives · Bandwidth Messaging API vs Twilio Programmable Messaging · All SMS APIs APIs

Each field above carries a numbered source - hover for a preview, click to jump here.

1. ↑Description: dev.bandwidth.com
2. ↑Pricing model: bandwidth.com
3. ↑Published pricing: bandwidth.com
4. ↑Free tier: bandwidth.com
5. ↑Free tier details: bandwidth.com
6. ↑Self-serve signup: bandwidth.com · bandwidth.com
7. ↑Requires sales call: bandwidth.com · bandwidth.com
8. ↑Enterprise plan: bandwidth.com
9. ↑Minimum commitment: bandwidth.com
10. ↑Supported actions: dev.bandwidth.com · dev.bandwidth.com
11. ↑Regions: bandwidth.com · bandwidth.com · bandwidth.com
12. ↑Input types: dev.bandwidth.com · dev.bandwidth.com
13. ↑Output types: dev.bandwidth.com · dev.bandwidth.com
14. ↑Webhooks: dev.bandwidth.com · dev.bandwidth.com
15. ↑Sandbox: dev.bandwidth.com · dev.bandwidth.com
16. ↑SDK languages: dev.bandwidth.com · github.com · dev.bandwidth.com
17. ↑MCP server: dev.bandwidth.com · github.com · bandwidth.com
18. ↑SOC 2: bandwidth.com
19. ↑HIPAA: bandwidth.com · bandwidth.com · bandwidth.com
20. ↑GDPR: bandwidth.com
21. ↑ISO 27001: bandwidth.com · investors.bandwidth.com
22. ↑PCI DSS: bandwidth.com
23. ↑Published SLA: bandwidth.com · bandwidth.com · bandwidth.com
24. ↑Rate limits: bandwidth.com · dev.bandwidth.com
25. ↑Known restrictions: dev.bandwidth.com · dev.bandwidth.com

Every field change, who made it, and when - from our audited data pipeline and editors.

1. 2026-06-15 Score Agent Friendliness: 35 → 45
2. 2026-06-15 Score Docs Quality: 25 → 45
3. 2026-06-15 API Reference URL: (none) → https://www.bandwidth.com/apis/
4. 2026-06-15 Robots Allows Agents: (none) → Yes
5. 2026-06-15 Has Structured Data: (none) → No
6. 2026-06-14 Score Agent Friendliness: 20 → 35
7. 2026-06-14 Score Docs Quality: 0 → 25
8. 2026-06-14 Llms Txt Present: (none) → Yes
9. 2026-06-14 Llms Txt URL: (none) → https://www.bandwidth.com/llms.txt
10. 2026-06-14 Rendering: (none) → static
11. 2026-06-14 Status Page URL: (none) → https://status.bandwidth.com
12. 2026-06-14 Docs URL: (none) → https://www.bandwidth.com/developers
13. 2026-06-10 Last Verified At: 2026-06-06T00:00:00.000Z → 2026-06-10T00:00:00.000Z
14. 2026-06-10 Score Procurement Friction: (none) → 30
15. 2026-06-10 Score Docs Quality: (none) → 0
16. 2026-06-10 Score Setup Speed: (none) → 25
17. 2026-06-10 Score Pricing Transparency: (none) → 70
18. 2026-06-10 Avoid If: (none) → You need to start building today without contacting sales, You want to try it f…
19. 2026-06-10 Score Agent Friendliness: (none) → 20
20. 2026-06-10 Score Trust Readiness: (none) → 90
21. 2026-06-10 Scoring Methodology: (none) → Scores are computed deterministically from this profile's published, sourced fi…
22. 2026-06-10 Best For: (none) → AI agents and automation - an agent-ready surface (MCP / llms.txt), Cost-sensit…
23. 2026-06-10 Starting Price Usd: 0.004 → 0.004
24. 2026-06-10 SDK Packages: Node.js, Python, Java, C#, Ruby, PHP → Node.js, Python, Java, C#, Ruby, PHP
25. 2026-06-10 SOC 2: set to type_2
26. 2026-06-10 HIPAA: set to Yes
27. 2026-06-10 GDPR: set to Yes
28. 2026-06-10 ISO 27001: set to Yes
29. 2026-06-10 SLA Published: set to Yes
30. 2026-06-10 Data Retention Policy URL: set to https://www.bandwidth.com/legal/data-protection-and-privacy/
31. 2026-06-10 Documented Rate Limits: set to 3500 requests per 5 minutes per Source IP address (API endpoint limit); 60 mess…
32. 2026-06-10 Rate Limit Requests: set to 60
33. 2026-06-10 Rate Limit Window: set to minute
34. 2026-06-10 Known Restrictions: set to Rate limits on messages are applied to segment count, not API request. This mea…
35. 2026-06-10 Auth Methods: set to basic, oauth2
36. 2026-06-10 Auth Docs URL: set to https://dev.bandwidth.com/docs/account/credentials/legacy/
37. 2026-06-10 API Style: set to rest
38. 2026-06-10 Base URL: set to https://messaging.bandwidth.com/api/v2
39. 2026-06-10 API Version: set to v2
40. 2026-06-10 Versioning Scheme: set to url
41. 2026-06-10 Stability: set to ga
42. 2026-06-10 Deprecation Policy URL: set to https://www.bandwidth.com/legal/communications-services-agreement/
43. 2026-06-10 MCP URL: set to https://dev.bandwidth.com/docs/tools/mcp/
44. 2026-06-10 Quickstart URL: set to https://dev.bandwidth.com/docs/messaging/quickStart/
45. 2026-06-10 Error Format: set to vendor-specific
46. 2026-06-10 Webhook Signing: set to hmac_sha256
47. 2026-06-10 Webhook Events URL: set to https://dev.bandwidth.com/docs/messaging/webhooks/
48. 2026-06-10 Requires Verification: set to No
49. 2026-06-10 Starting Price Usd: set to 0.004
50. 2026-06-10 Price Basis: set to message

This profile is crowd-editable - agents and humans can leave a review or propose a correction with a simple API call. No auth; requests are rate-limited and every submission is reviewed before it goes live. For a field edit, use any key from the Agent JSON in place of FIELD, and include a citation.

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