engageSPARK

engageSPARK is a mobile messaging and engagement platform for reaching hard-to-reach populations in low- and middle-income countries at scale. It lets NGOs, researchers, microfinance institutions, and businesses run SMS, automated voice (IVR), WhatsApp, and pre-paid airtime top-up campaigns across 180+ countries without writing code, or programmatically through its HTTP API. The engageSPARK API (api.engagespark.com, v1) exposes token-authenticated endpoints for sending SMS, WhatsApp, and airtime top-ups, managing contacts and organizations, subscribing and unsubscribing contacts to voice and SMS campaigns, reading message and top-up history, checking organization balance, and managing files. Incoming-SMS and campaign-action webhooks let the platform push survey responses and inbound messages into external systems such as Salesforce or Qualtrics.

engageSPARK publishes 7 APIs on the APIs.io network, including Balance API, Campaigns API, Contacts API, and 4 more. Tagged areas include Company, Messaging, SMS, Voice, and WhatsApp.

The engageSPARK catalog on APIs.io includes 1 event-driven AsyncAPI specification.

engageSPARK’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, signup flow, and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub

34.1/100 thin ▬ flat Agent 34/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

Company Messaging SMS Voice WhatsApp Airtime Communications CPaaS Surveys International Development

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 34.1/100 · thin

Contract Quality 11.9 / 19

Developer Ergonomics 4.6 / 15

Access Clarity 2.6 / 15

Operational Transparency 1.0 / 10

Contract Governance 0.4 / 9

Discoverability 5.7 / 8

Regulatory Posture 4.4 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 34/100 · 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 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 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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/.

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 github.com/api-evangelist/engagespark: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 7

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

engageSPARK Balance API

The Balance API from engageSPARK — 1 operation(s) for balance.

engageSPARK Campaigns API

The Campaigns API from engageSPARK — 2 operation(s) for campaigns.

engageSPARK Contacts API

The Contacts API from engageSPARK — 2 operation(s) for contacts.

engageSPARK Files API

The Files API from engageSPARK — 2 operation(s) for files.

engageSPARK SMS API

The SMS API from engageSPARK — 4 operation(s) for sms.

engageSPARK Top-Up API

The Top-Up API from engageSPARK — 3 operation(s) for top-up.

engageSPARK WhatsApp API

The WhatsApp API from engageSPARK — 3 operation(s) for whatsapp.

Scroll for all 7

Open Collections 8

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

API Collection

OPEN COLLECTION

engageSPARK Balance API

OPEN COLLECTION

engageSPARK Balance Campaigns API

OPEN COLLECTION

engageSPARK Balance Contacts API

OPEN COLLECTION

engageSPARK Balance Files API

OPEN COLLECTION

engageSPARK Balance SMS API

OPEN COLLECTION

engageSPARK Balance Top-Up API

OPEN COLLECTION

engageSPARK Balance WhatsApp API

OPEN COLLECTION

Scroll for all 8

Event Specifications 1

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

Engagespark Webhooks

ASYNCAPI

Security Posture 2

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

Engagespark Authentication

http · 1 scheme

SECURITY

Engagespark Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Engagespark Agentic Access

23 operations · 12 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

AgenticAccess

LLMsTxt

AgentSkill

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Source (apis.yml)

aid: engagespark
name: engageSPARK
description: engageSPARK is a mobile messaging and engagement platform for reaching hard-to-reach populations in low- and
  middle-income countries at scale. It lets NGOs, researchers, microfinance institutions, and businesses run SMS, automated
  voice (IVR), WhatsApp, and pre-paid airtime top-up campaigns across 180+ countries without writing code, or programmatically
  through its HTTP API. The engageSPARK API (api.engagespark.com, v1) exposes token-authenticated endpoints for sending SMS,
  WhatsApp, and airtime top-ups, managing contacts and organizations, subscribing and unsubscribing contacts to voice and
  SMS campaigns, reading message and top-up history, checking organization balance, and managing files. Incoming-SMS and campaign-action
  webhooks let the platform push survey responses and inbound messages into external systems such as Salesforce or Qualtrics.
url: https://raw.githubusercontent.com/api-evangelist/engagespark/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: stub
x-tier-reason: portfolio-lead
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: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
image: https://www.engagespark.com/wp-content/uploads/2017/03/engagespark_logo_small.png
tags:
- Company
- Messaging
- SMS
- Voice
- WhatsApp
- Airtime
- Communications
- CPaaS
- Surveys
- International Development
apis:
- aid: engagespark:engagespark-balance-api
  name: engageSPARK Balance API
  description: The Balance API from engageSPARK — 1 operation(s) for balance.
  humanURL: https://openapi.engagespark.com/
  baseURL: https://api.engagespark.com
  tags:
  - Balances
  tags_raw:
  - Balance
  properties:
  - type: OpenAPI
    url: openapi/engagespark-balance-api-openapi.yml
  - type: Authentication
    url: authentication/engagespark-authentication.yml
  - type: ErrorCatalog
    url: errors/engagespark-problem-types.yml
  - type: Conventions
    url: conventions/engagespark-conventions.yml
  - type: Idempotency
    url: conventions/engagespark-conventions.yml
  - type: DataModel
    url: data-model/engagespark-data-model.yml
  - type: Conformance
    url: conformance/engagespark-conformance.yml
  - type: Lifecycle
    url: lifecycle/engagespark-lifecycle.yml
  - type: Webhooks
    url: asyncapi/engagespark-webhooks.yml
- aid: engagespark:engagespark-campaigns-api
  name: engageSPARK Campaigns API
  description: The Campaigns API from engageSPARK — 2 operation(s) for campaigns.
  humanURL: https://openapi.engagespark.com/
  baseURL: https://api.engagespark.com
  tags:
  - Campaigns
  properties:
  - type: OpenAPI
    url: openapi/engagespark-campaigns-api-openapi.yml
  - type: Authentication
    url: authentication/engagespark-authentication.yml
  - type: ErrorCatalog
    url: errors/engagespark-problem-types.yml
  - type: Conventions
    url: conventions/engagespark-conventions.yml
  - type: Idempotency
    url: conventions/engagespark-conventions.yml
  - type: DataModel
    url: data-model/engagespark-data-model.yml
  - type: Conformance
    url: conformance/engagespark-conformance.yml
  - type: Lifecycle
    url: lifecycle/engagespark-lifecycle.yml
  - type: Webhooks
    url: asyncapi/engagespark-webhooks.yml
- aid: engagespark:engagespark-contacts-api
  name: engageSPARK Contacts API
  description: The Contacts API from engageSPARK — 2 operation(s) for contacts.
  humanURL: https://openapi.engagespark.com/
  baseURL: https://api.engagespark.com
  tags:
  - Contacts
  properties:
  - type: OpenAPI
    url: openapi/engagespark-contacts-api-openapi.yml
  - type: Authentication
    url: authentication/engagespark-authentication.yml
  - type: ErrorCatalog
    url: errors/engagespark-problem-types.yml
  - type: Conventions
    url: conventions/engagespark-conventions.yml
  - type: Idempotency
    url: conventions/engagespark-conventions.yml
  - type: DataModel
    url: data-model/engagespark-data-model.yml
  - type: Conformance
    url: conformance/engagespark-conformance.yml
  - type: Lifecycle
    url: lifecycle/engagespark-lifecycle.yml
  - type: Webhooks
    url: asyncapi/engagespark-webhooks.yml
- aid: engagespark:engagespark-files-api
  name: engageSPARK Files API
  description: The Files API from engageSPARK — 2 operation(s) for files.
  humanURL: https://openapi.engagespark.com/
  baseURL: https://api.engagespark.com
  tags:
  - File
  tags_raw:
  - Files
  properties:
  - type: OpenAPI
    url: openapi/engagespark-files-api-openapi.yml
  - type: Authentication
    url: authentication/engagespark-authentication.yml
  - type: ErrorCatalog
    url: errors/engagespark-problem-types.yml
  - type: Conventions
    url: conventions/engagespark-conventions.yml
  - type: Idempotency
    url: conventions/engagespark-conventions.yml
  - type: DataModel
    url: data-model/engagespark-data-model.yml
  - type: Conformance
    url: conformance/engagespark-conformance.yml
  - type: Lifecycle
    url: lifecycle/engagespark-lifecycle.yml
  - type: Webhooks
    url: asyncapi/engagespark-webhooks.yml
- aid: engagespark:engagespark-sms-api
  name: engageSPARK SMS API
  description: The SMS API from engageSPARK — 4 operation(s) for sms.
  humanURL: https://openapi.engagespark.com/
  baseURL: https://api.engagespark.com
  tags:
  - SMS
  properties:
  - type: OpenAPI
    url: openapi/engagespark-sms-api-openapi.yml
  - type: Authentication
    url: authentication/engagespark-authentication.yml
  - type: ErrorCatalog
    url: errors/engagespark-problem-types.yml
  - type: Conventions
    url: conventions/engagespark-conventions.yml
  - type: Idempotency
    url: conventions/engagespark-conventions.yml
  - type: DataModel
    url: data-model/engagespark-data-model.yml
  - type: Conformance
    url: conformance/engagespark-conformance.yml
  - type: Lifecycle
    url: lifecycle/engagespark-lifecycle.yml
  - type: Webhooks
    url: asyncapi/engagespark-webhooks.yml
- aid: engagespark:engagespark-top-up-api
  name: engageSPARK Top-Up API
  description: The Top-Up API from engageSPARK — 3 operation(s) for top-up.
  humanURL: https://openapi.engagespark.com/
  baseURL: https://api.engagespark.com
  tags:
  - Top-Up
  properties:
  - type: OpenAPI
    url: openapi/engagespark-top-up-api-openapi.yml
  - type: Authentication
    url: authentication/engagespark-authentication.yml
  - type: ErrorCatalog
    url: errors/engagespark-problem-types.yml
  - type: Conventions
    url: conventions/engagespark-conventions.yml
  - type: Idempotency
    url: conventions/engagespark-conventions.yml
  - type: DataModel
    url: data-model/engagespark-data-model.yml
  - type: Conformance
    url: conformance/engagespark-conformance.yml
  - type: Lifecycle
    url: lifecycle/engagespark-lifecycle.yml
  - type: Webhooks
    url: asyncapi/engagespark-webhooks.yml
- aid: engagespark:engagespark-whatsapp-api
  name: engageSPARK WhatsApp API
  description: The WhatsApp API from engageSPARK — 3 operation(s) for whatsapp.
  humanURL: https://openapi.engagespark.com/
  baseURL: https://api.engagespark.com
  tags:
  - WhatsApp
  properties:
  - type: OpenAPI
    url: openapi/engagespark-whatsapp-api-openapi.yml
  - type: Authentication
    url: authentication/engagespark-authentication.yml
  - type: ErrorCatalog
    url: errors/engagespark-problem-types.yml
  - type: Conventions
    url: conventions/engagespark-conventions.yml
  - type: Idempotency
    url: conventions/engagespark-conventions.yml
  - type: DataModel
    url: data-model/engagespark-data-model.yml
  - type: Conformance
    url: conformance/engagespark-conformance.yml
  - type: Lifecycle
    url: lifecycle/engagespark-lifecycle.yml
  - type: Webhooks
    url: asyncapi/engagespark-webhooks.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: CapabilityMap
  url: capabilities/engagespark-capability-edges.yml
  name: engageSPARK Business Capability Map
- type: X-MCPServerCandidate
  url: mcp/engagespark-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: Overlay
  url: overlays/engagespark-openapi-overlay.yaml
- type: AgenticAccess
  url: agentic-access/engagespark-agentic-access.yml
- type: DomainSecurity
  url: security/engagespark-domain-security.yml
- type: Website
  url: https://engagespark.com
- type: DeveloperPortal
  url: https://www.engagespark.com/support/how-can-i-use-your-api/
- type: Documentation
  url: https://openapi.engagespark.com/
- type: APIReference
  url: https://openapi.engagespark.com/
- type: GettingStarted
  url: https://www.engagespark.com/support/getting-started/
- type: Support
  url: https://www.engagespark.com/support/
- type: Blog
  url: https://www.engagespark.com/blog/
- type: Pricing
  url: https://www.engagespark.com/pricing/
- type: SignUp
  url: https://app.engagespark.com/register
- type: Login
  url: https://app.engagespark.com/login
- type: TermsOfService
  url: https://www.engagespark.com/terms-of-service/
- type: PrivacyPolicy
  url: https://www.engagespark.com/privacy-policy/
- type: GitHubOrganization
  url: https://github.com/engagespark
- type: LLMsTxt
  url: llms/engagespark-llms.txt
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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