BulkSMS

BulkSMS provides a business SMS platform enabling companies to send, receive and manage text messages globally. With over 25 years in business messaging, they support 180+ countries, 800+ local networks, and offer features like web-to-SMS, shortcodes, long numbers, RCS messaging, and integrations via REST, legacy EAPI, and SMPP. Their API allows developers to automate notifications, alerts, and marketing campaigns, backed by robust pricing, compliance, and support resources.

BulkSMS publishes 6 API contracts indexed on the APIs.io network, including Attachments API, Blocked Numbers API, Credits API, and 3 more. Tagged areas include SMS, Messaging, Communications, Business, and Bulk SMS.

The BulkSMS catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

BulkSMS’s developer surface includes getting-started guide, authentication, documentation, API reference, pricing, support, signup flow, and 22 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

35.9/100 thin ▼ -8.4 Agent 30/100 agent ready Heartbeat 99/100 alive Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 3 Agent Skills

SMS Messaging Communications Business Bulk SMS

Kin Score

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

Composite quality — 35.9/100 · thin

Contract Quality 11.3 / 19

Developer Ergonomics 6.3 / 15

Access Clarity 2.6 / 15

Operational Transparency 0.3 / 10

Contract Governance 2.0 / 9

Discoverability 5.6 / 8

Regulatory Posture 2.4 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 30/100 · 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 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 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 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 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/.

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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
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
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)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

6 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 17.1 — up to +16.6 composite points
Operational Transparency scores 2.6 — up to +12.7 composite points
Developer Ergonomics scores 42.3 — up to +11.5 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/bulksms/apis.yml: open an issue on github.com/api-evangelist/bulksms 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 →

Standards implemented 1

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.

OpenAPI

measured — observed by APIs.io (published)

APIs 6

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

BulkSMS Attachments API

Operations related to SMS attachments

BulkSMS Blocked Numbers API

Blocked number management operations

BulkSMS Credits API

Credit management operations

BulkSMS Message API

A message record represents an SMS that has been sent or received. To send messages, create a `SubmissionEntry` and submit it to the Send Messages Operation. You can retrieve se...

BulkSMS Profile API

Operations related to the profile of the user

BulkSMS Webhooks API

Manage webhooks that notify your server when messages are sent or received. For full details on implementing your webhook — including event types, request headers, payload struc...

Agent Skills 3

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

bulksms-blocked-numbers-manage

AGENT SKILL

bulksms-manage-webhooks

AGENT SKILL

bulksms-send-message

AGENT SKILL

BulkSMS API pricing

Pricing Plans 1

Published pricing tiers and plan structures.

Bulksms Plans Pricing

0 plans

PLANS

FinOps 1

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

Bulksms Finops

FINOPS

Semantic Vocabularies 1

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

Bulksms Context

11 classes · 45 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

BulkSMS API Rules

14 rules · 12 errors 1 warnings 1 info

SPECTRAL

JSON Schema 6

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

Message

14 properties

JSON SCHEMA

PreSignInfo

3 properties

JSON SCHEMA

Profile

8 properties

JSON SCHEMA

SubmissionEntry

10 properties

JSON SCHEMA

TransferEntry

5 properties

JSON SCHEMA

WebhookEntry

7 properties

JSON SCHEMA

Security Posture 2

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

Bulksms Authentication

http · 1 scheme

SECURITY

Bulksms Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Bulksms Agentic Access

15 operations · 7 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

DeveloperPortal

DeveloperPortal

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Idempotency

Conventions

ErrorCatalog

Conformance

Scroll for all 8

Build 3

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

Pricing

Pricing

Company 2

The organization behind the API

Newsroom

Newsroom

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: bulksms
name: BulkSMS
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://www.bulksms.com/images/share/bulksms-social-share-2026.jpg
description: BulkSMS provides a business SMS platform enabling companies to send, receive and manage text messages globally.
  With over 25 years in business messaging, they support 180+ countries, 800+ local networks, and offer features like web-to-SMS,
  shortcodes, long numbers, RCS messaging, and integrations via REST, legacy EAPI, and SMPP. Their API allows developers to
  automate notifications, alerts, and marketing campaigns, backed by robust pricing, compliance, and support resources.
url: https://raw.githubusercontent.com/api-evangelist/bulksms/refs/heads/main/apis.yml
x-type: company
x-source: harvest:tag-qc
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-14 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-13'
modified: '2026-10-13'
tags:
- SMS
- Messaging
- Communications
- Business
- Bulk SMS
tags_raw:
- SMS
- Messaging
- Communications
- Business
- BulkSMS
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/bulksms-agentic-access.yml
- type: Spectral
  url: rules/bulksms-rules.yml
- type: JSONLD
  url: json-ld/bulksms-context.jsonld
- type: Vocabulary
  url: vocabulary/bulksms-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/bulksms-data-model.yml
- type: Idempotency
  url: conventions/bulksms-conventions.yml
- type: Conventions
  url: conventions/bulksms-conventions.yml
- type: ErrorCatalog
  url: errors/bulksms-problem-types.yml
- type: Conformance
  url: conformance/bulksms-conformance.yml
- type: LLMsTxt
  url: llms/bulksms-llms.txt
- type: Hosts
  url: hosts/bulksms-hosts.yml
- type: Vendors
  url: vendors/bulksms-vendors.yml
- type: SDKs
  url: packages/bulksms-packages.yml
- type: Packages
  url: packages/bulksms-packages.yml
- type: TermsOfService
  url: https://www.bulksms.com/company/terms-and-conditions.htm
- type: Newsroom
  url: https://www.bulksms.com/resources/news/
- type: GettingStarted
  url: https://www.bulksms.com/developer/eapi
- type: GitHubOrganization
  url: https://github.com/BulkSMS
- type: Authentication
  url: authentication/bulksms-authentication.yml
- type: DomainSecurity
  url: security/bulksms-domain-security.yml
- type: Website
  url: https://www.bulksms.com
- type: DeveloperPortal
  url: https://www.bulksms.com/developer/
- type: Documentation
  url: https://www.bulksms.com/developer/
- type: APIReference
  url: https://www.bulksms.com/developer/
- type: Pricing
  url: https://www.bulksms.com/pricing/
- type: Support
  url: https://www.bulksms.com/support/
- type: SignUp
  url: https://www1.bulksms.com/register/
- type: Login
  url: https://www.bulksms.com/account/
apis:
- aid: bulksms:bulksms-attachments-api
  name: BulkSMS Attachments API
  description: Operations related to SMS attachments
  humanURL: https://www.bulksms.com/developer/
  baseURL: https://api.bulksms.com/v1
  tags:
  - Attachments
  properties:
  - type: OpenAPI
    url: openapi/bulksms-attachments-api-openapi.yml
  - type: JSONSchema
    url: json-schema/bulksms-submission-entry-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-message-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-webhook-entry-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-profile-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-transfer-entry-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-pre-sign-info-schema.json
- aid: bulksms:bulksms-blocked-numbers-api
  name: BulkSMS Blocked Numbers API
  description: Blocked number management operations
  humanURL: https://www.bulksms.com/developer/
  baseURL: https://api.bulksms.com/v1
  tags:
  - Blocked Numbers
  properties:
  - type: OpenAPI
    url: openapi/bulksms-blocked-numbers-api-openapi.yml
  - type: JSONSchema
    url: json-schema/bulksms-submission-entry-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-message-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-webhook-entry-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-profile-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-transfer-entry-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-pre-sign-info-schema.json
- aid: bulksms:bulksms-credits-api
  name: BulkSMS Credits API
  description: Credit management operations
  humanURL: https://www.bulksms.com/developer/
  baseURL: https://api.bulksms.com/v1
  tags:
  - Credit
  tags_raw:
  - Credits
  properties:
  - type: OpenAPI
    url: openapi/bulksms-credits-api-openapi.yml
  - type: JSONSchema
    url: json-schema/bulksms-submission-entry-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-message-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-webhook-entry-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-profile-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-transfer-entry-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-pre-sign-info-schema.json
- aid: bulksms:bulksms-message-api
  name: BulkSMS Message API
  description: 'A message record represents an SMS that has been sent or received.


    To send messages, create a `SubmissionEntry` and submit it to the Send Messages Operation.


    You can retrieve sent and received messages in a number of ways.


    ### Retrieving messages by status


    Messages are assigned a status as they progress through their lifecycle.  You can use the List Messages Operation to filter
    by various statuses.  For the status values used to filter, see the `status.type` and `status.subtype` values of the `Message`
    object.  You supply a value for the `filter` query parameter following this pattern `status.type==SENT`.  Since more than
    one messages are normally returned, you can also paginate the result using the `sortOrder` and `limit` query parameters.  Note
    that `limit` is not the only way to limit the number of records.  The result will also be limited by the `filter.submissionDate`
    property.  The default value for this property is `NOW() - 7 days`.


    Messages can also be retrieved by the webhook mechanism.  See the [webhooks page](/developer/webhooks/) for more information.


    ### Sending and receiving messages


    The examples shown in this section are for a single message submission.


    If you need to send a single text message to one or more recipients you will need to create a `SubmissionEntry` object
    and submit it to the Send Messages Operation.  For more advanced submission types, make use of the [Send Messages Operation](#tag/message/POST/messages)
    which supports batch sending (by submitting an array) and scheduling (via the `schedule-date` query parameter).


    The following fields can be set for a `SubmissionEntry`:

    - the `to` field is required and contains the phone number or group details

    - the `body` field is required and contains the message content

    - other fields like `from`, `routingGroup`, `encoding`, etc. are optional


    ### Body Templates


    When sending a message you can use template fields to customise the message text.


    *Field based templates* allow you to create a message with place-holders for custom fields.  Fields are identified by
    a zero based index; the first field is `F0`, the second is `F1` and so on.


    For example, if you want to send a message "Welcome Jack, you owe $200.00", supply the body as `"Welcome {F0######}, you
    owe {F1######}"` and send `"fields": ["Jack", "$200.00"]` in the relevant `to` entry.  The `#` characters specify the
    maximum length of the field.


    If you are sending to contacts in your phonebook, you can use *Phonebook based templates*.  The template for the contact''s
    first name is `{fn######}` and the surname is `{sn######}`.


    See the [Send Messages Operation](#tag/message/POST/messages) for detailed examples.'
  humanURL: https://www.bulksms.com/developer/
  baseURL: https://api.bulksms.com/v1
  tags:
  - Message
  properties:
  - type: OpenAPI
    url: openapi/bulksms-message-api-openapi.yml
  - type: JSONSchema
    url: json-schema/bulksms-submission-entry-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-message-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-webhook-entry-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-profile-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-transfer-entry-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-pre-sign-info-schema.json
- aid: bulksms:bulksms-profile-api
  name: BulkSMS Profile API
  description: Operations related to the profile of the user
  humanURL: https://www.bulksms.com/developer/
  baseURL: https://api.bulksms.com/v1
  tags:
  - Profiles
  tags_raw:
  - Profile
  properties:
  - type: OpenAPI
    url: openapi/bulksms-profile-api-openapi.yml
  - type: JSONSchema
    url: json-schema/bulksms-submission-entry-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-message-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-webhook-entry-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-profile-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-transfer-entry-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-pre-sign-info-schema.json
- aid: bulksms:bulksms-webhooks-api
  name: BulkSMS Webhooks API
  description: 'Manage webhooks that notify your server when messages are sent or received.


    For full details on implementing your webhook — including event types, request headers, payload structure, retry logic,
    and testing — see the [Webhook Developer Guide](/developer/webhooks/).'
  humanURL: https://www.bulksms.com/developer/
  baseURL: https://api.bulksms.com/v1
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/bulksms-webhooks-api-openapi.yml
  - type: JSONSchema
    url: json-schema/bulksms-submission-entry-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-message-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-webhook-entry-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-profile-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-transfer-entry-schema.json
  - type: JSONSchema
    url: json-schema/bulksms-pre-sign-info-schema.json
x-enrichment:
  date: '2026-10-14'
  status: enriched
  artifacts_added: 29
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

BulkSMS API — frequently asked questions

Does BulkSMS have an API?

Yes. APIs.io lists 6 APIs from BulkSMS, including BulkSMS Attachments API, BulkSMS Blocked Numbers API and BulkSMS Credits API, and 3 more.

Is there an OpenAPI specification for the BulkSMS API?

Yes. APIs.io indexes 6 OpenAPI specifications for BulkSMS, each linked for download from this page.

How do I authenticate with the BulkSMS API?

BulkSMS uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Bulksms Authentication.

Is the BulkSMS API ready for AI agents?

BulkSMS has a Kin Score of 35.9 out of 100 (thin) and an Agent Readiness score of 29.5 (agent-ready), scored by API Evangelist on 2026-11-06.

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