Sendoso

Sendoso is a corporate gifting and direct mail platform that lets sales, marketing, customer success and people teams send physical gifts, branded swag, eGifts, direct mail and charitable donations at scale. The Sendoso Core API (v3) automates sending against pre-configured campaigns — physical gifts to a known address, physical gifts with recipient address collection, and eGifts delivered by email or as embeddable links — while the Marketplace and SmartSend APIs send from an open catalog and let Sendoso pick the gift from the recipient's interests. A SCIM 2.0 surface handles user provisioning, an embeddable iFrame puts the whole send flow inside a partner application, and Svix-signed webhooks report twenty-eight send lifecycle events. Sendoso also ships an OAuth-protected MCP server, an agent skill and an A2A agent card, and integrates with Salesforce, HubSpot, Outreach, SalesLoft, Marketo and other CRM and sales engagement tools.

Sendoso is listed with 8 APIs on the APIs.io network, including Marketplace and SmartSend API, Webhooks, Campaigns API, and 5 more. Tagged areas include Corporate Gifting, Direct Mail, Sales Engagement, Marketing Automation, and CRM Integration.

The Sendoso catalog on APIs.io includes 1 event-driven AsyncAPI specification and 2 Spectral governance rulesets.

Sendoso’s developer surface includes developer portal, documentation, API reference, getting-started guide, authentication, sandbox, support, and 38 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

58.1/100 strong ▬ flat Agent 46/100 agent native Front door AI 4/6 moderate Heartbeat 50/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

8 APIs 1 MCP Servers 1 Agent Skills

Corporate Gifting Direct Mail Sales Engagement Marketing Automation CRM IntegrationeGiftsSwag and MerchandiseFulfillment Employee Recognition Account Based MarketingSCIM ProvisioningWebhook A2A

Kin Score

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

Composite quality — 58.1/100 · strong

Contract Quality 5.4 / 19

Developer Ergonomics 10.7 / 15

Access Clarity 11.6 / 15

Operational Transparency 4.1 / 10

Contract Governance 2.9 / 9

Discoverability 6.0 / 8

Regulatory Posture 6.8 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 46/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 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 8 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 0 / 5

Distinct Operations 0 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too
Pagination +5 pts — share of collection GETs (an array, or one wrapped in data/items/results ...) that declare a page/limit/offset/cursor parameter, a Link header or a next/cursor field; na with no collection GETs
Protected Resource Metadata +5 pts — a served /.well-known/oauth-protected-resource carrying `resource` (documented), and naming its authorization_servers (verified)
Agentic Commerce Well-Known Document +5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service, OR (0.27) a live x402 payment challenge from _data/x402-adoption.json — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's

4 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 28.8 — up to +17.8 composite points
Contract Governance scores 31.8 — up to +8.2 composite points
Operational Transparency scores 42.1 — up to +7.5 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/sendoso/apis.yml: open an issue on github.com/api-evangelist/sendoso 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
Salesforce AppExchange (CRM, outbound, business-process automation)	builds-on	38.1	-	1
Adobe Exchange (publishers of Creative Cloud, Experience Cloud and Document Cloud integrations)	builds-on	38.1	-	1

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 7

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.

Agent2Agent

measured — observed by APIs.io (conformant)

SCIM 2.0

prose — states compatibility; nothing published to check it against

5 core of 24 operations graded · api-commons/identity

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

Agent Skills

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

AsyncAPI

measured — observed by APIs.io (published)

OAuth 2.0

measured — observed by APIs.io (declared)

APIs 8

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

Sendoso Marketplace and SmartSend API

Browse the Sendoso marketplace catalog, get AI-selected gift recommendations for a recipient, and send either. Four operations on /api/v3, scoped to `marketplace` and `smartsend`.

Sendoso Webhooks

Twenty-eight Svix-signed send lifecycle events delivered to an endpoint you control. Subscriptions are configured in a hosted portal; there is no webhook management API.

Sendoso MCP Server

OAuth-protected remote MCP server over the Sendoso platform, at https://app.sendoso.com/mcp. Publishes RFC 9728 protected-resource and RFC 8414 authorization-server metadata wit...

Sendoso Campaigns API

Campaigns, called "touches" in the API.

Sendoso Sends API

Create and retrieve gift, direct mail and eGift sends.

Sendoso Smart Send API

AI-selected gift recommendations and sending them.

Sendoso Teams API

Team groups and their members.

Sendoso Users API

Read the authorized user, list organization users, invite new users.

Scroll for all 8

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Sendoso MCP Server

Sendoso ships TWO remote MCP servers, and they are different products. The production server at https://app.sendoso.com/mcp is an OAuth-protected agent surface over the Sendoso ...

MCP SERVER

Agent Skills 1

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

Sendoso

AGENT SKILL

Sendoso API pricing

Prices published by Sendoso, read 2026-10-28 from www.sendoso.com/compare-plans.

Plan	Price
Start with Merch	Talk to sales Includes: 5 licenses included; Unlimited branded swag sourcing; Merch on demand; Low minimums, no spend commit
Start with Gifting	Talk to sales Includes: 5 licenses included; 100 marketplace sends / month; Global eGifts + Marketplace; 1 integration + MCP
Core	Talk to sales Includes: 10 licenses included; Unlimited + bulk sending; Global storage and fulfillment (1 region); Campaign
Advanced	Talk to sales Includes: 50 licenses included; 2 regions; Campaign Studio (unlimited projects); AI Agent: Oso; Unlimited inte
Enterprise	Talk to sales Includes: Custom licenses included; all regions; Policy Center; SCIM; 2 product environments

Plan details, limits and sources →

Rate limits

: 10 1s
: 100 1m

Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

Sendoso Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Sendoso Rate Limits

2 limits

RATE LIMITS

Service Levels 1

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

Sendoso

SLA

FinOps 1

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

Sendoso Finops

FINOPS

Event Specifications 1

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

Sendoso Webhooks

Sendoso webhooks deliver real-time send status updates. Sendoso does not publish an AsyncAPI document; this description was generated by API Evangelist from Sendoso's own webhoo...

ASYNCAPI

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Sendoso — jsonschema rules

5 rules · 4 warnings 1 info

SPECTRAL

Sendoso API Rules

8 rules · 5 errors 2 warnings 1 info

SPECTRAL

OpenAPI Overlays 3

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Sendoso Core Overlay

3 actions · update · sendoso-core-api-openapi.yml

DERIVED

Sendoso Marketplace Overlay

1 action · update · sendoso-marketplace-api-openapi.yml

DERIVED

Sendoso Scim Overlay

2 actions · update · sendoso-scim-api-openapi.yml

DERIVED

Security Posture 4

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

Sendoso Authentication

oauth2 · 1 scheme

SECURITY

Sendoso Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Sendoso Vulnerability Disclosure

Hackerone

SECURITY

Sendoso Trust Center

trust center published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Sendoso Scopes

6 scopes · authorizationCode

6 scopes

SCOPES

Resources

Get Started 5

Portal, sign-up, and the first successful call

DeveloperPortal

Portal

GettingStarted

Sandbox

Login

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

AsyncAPI

AsyncAPI

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

WellKnown

MCPServer

AgentSkill

LLMsTxt

LlmsText

Design & Contract 10

Pagination, idempotency, versioning, errors, and events

Conventions

Idempotency

ErrorCatalog

Lifecycle

Conformance

DataModel

Components

Webhooks

SpectralRules

Vocabulary

Scroll for all 10

Build 3

SDKs, sample code, and the tooling you integrate with

Packages

Packages

ToolCrosswalk

ToolCrosswalk

GitHubOrganization

GitHubOrganization

Access & Security 6

Authentication, authorization, and security posture

Authentication

OAuthScopes

DomainSecurity

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

SecurityCenter

SecurityCenter

Operate 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

HelpCenter

HelpCenter

Support

Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 3

The organization behind the API

Website

Website

Blog

Blog

LinkedIn

Other 3

Properties that don't map to a standard resource type

Overlay

Overlay

Overlay

Overlay

AgentCard

AgentCard

Source (apis.yml)

name: Sendoso
description: Sendoso is a corporate gifting and direct mail platform that lets sales, marketing, customer success and people
  teams send physical gifts, branded swag, eGifts, direct mail and charitable donations at scale. The Sendoso Core API (v3)
  automates sending against pre-configured campaigns — physical gifts to a known address, physical gifts with recipient address
  collection, and eGifts delivered by email or as embeddable links — while the Marketplace and SmartSend APIs send from an
  open catalog and let Sendoso pick the gift from the recipient's interests. A SCIM 2.0 surface handles user provisioning,
  an embeddable iFrame puts the whole send flow inside a partner application, and Svix-signed webhooks report twenty-eight
  send lifecycle events. Sendoso also ships an OAuth-protected MCP server, an agent skill and an A2A agent card, and integrates
  with Salesforce, HubSpot, Outreach, SalesLoft, Marketo and other CRM and sales engagement tools.
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: subscription
  onboarding: request
  trial: false
  try_now: false
  public: false
  label: Subscription · Sales-gated · Credentials issued by email
  confidence: high
  source:
  - https://www.sendoso.com/compare-plans
  - https://developer.sendoso.com/rest-api/overview/authentication
  generated: '2026-08-13'
  method: searched
  note: Corrected 2026-08-13. The previous "Freemium / self-serve" label came from a 2026-05-04 scaffold plans file. Sendoso
    publishes four named tiers with no prices and no self-serve signup, and API client credentials are issued by hand on request
    to developers@sendoso.com.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sendoso.png
url: https://raw.githubusercontent.com/api-evangelist/sendoso/refs/heads/main/apis.yml
created: '2026-05-02'
modified: '2026-08-13'
specificationVersion: '0.23'
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
tags:
- Corporate Gifting
- Direct Mail
- Sales Engagement
- Marketing Automation
- CRM Integration
- eGifts
- Swag and Merchandise
- Fulfillment
- Employee Recognition
- Account Based Marketing
- SCIM Provisioning
- Webhook
- A2A
tags_raw:
- Corporate Gifting
- Direct Mail
- Sales Engagement
- Marketing Automation
- CRM Integration
- eGifts
- Swag and Merchandise
- Fulfillment
- Employee Recognition
- Account Based Marketing
- SCIM Provisioning
- Webhooks
- A2A
apis:
- aid: sendoso:sendoso-marketplace-api
  name: Sendoso Marketplace and SmartSend API
  description: Browse the Sendoso marketplace catalog, get AI-selected gift recommendations for a recipient, and send either.
    Four operations on /api/v3, scoped to `marketplace` and `smartsend`.
  humanURL: https://developer.sendoso.com/marketplace/overview/introduction
  baseURL: https://app.sendoso.com/api/v3
  tags:
  - Marketplace
  - SmartSend
  - Recommendations
  properties:
  - type: OpenAPI
    url: openapi/sendoso-marketplace-api-openapi.yml
  - type: Overlay
    url: overlays/sendoso-marketplace-overlay.yaml
  - type: Documentation
    url: https://developer.sendoso.com/marketplace/overview/introduction
  - type: APIReference
    url: https://developer.sendoso.com/marketplace/reference/products/get-products
  - type: Authentication
    url: https://developer.sendoso.com/marketplace/overview/authentication
  - type: RateLimits
    url: https://developer.sendoso.com/marketplace/overview/rate-limits
- aid: sendoso:sendoso-webhooks
  name: Sendoso Webhooks
  description: Twenty-eight Svix-signed send lifecycle events delivered to an endpoint you control. Subscriptions are configured
    in a hosted portal; there is no webhook management API.
  humanURL: https://developer.sendoso.com/webhooks/introduction
  baseURL: https://developer.sendoso.com/webhooks/introduction
  tags:
  - Webhook
  - Event
  tags_raw:
  - Webhooks
  - Events
  properties:
  - type: AsyncAPI
    url: asyncapi/sendoso-webhooks-asyncapi.yml
  - type: Webhooks
    url: https://developer.sendoso.com/webhooks/events
  - type: Documentation
    url: https://developer.sendoso.com/webhooks/introduction
  - type: Security
    url: https://developer.sendoso.com/webhooks/security
- aid: sendoso:sendoso-mcp
  name: Sendoso MCP Server
  description: OAuth-protected remote MCP server over the Sendoso platform, at https://app.sendoso.com/mcp. Publishes RFC
    9728 protected-resource and RFC 8414 authorization-server metadata with dynamic client registration and PKCE. Sold from
    the Core plan tier upward.
  humanURL: https://www.sendoso.com/compare-plans
  baseURL: https://app.sendoso.com/mcp
  tags:
  - MCP
  - Agents
  properties:
  - type: MCPServer
    url: mcp/sendoso-mcp.yml
  - type: ToolCrosswalk
    url: mcp/sendoso-tool-crosswalk.yml
  - type: OAuthMetadata
    url: well-known/sendoso-oauth-authorization-server-mcp.json
- aid: sendoso:sendoso-campaigns-api
  name: Sendoso Campaigns API
  description: Campaigns, called "touches" in the API.
  humanURL: https://developer.sendoso.com/rest-api/overview/introduction
  baseURL: https://app.sendoso.com/api/v3
  tags:
  - Campaigns
  properties:
  - type: OpenAPI
    url: openapi/sendoso-campaigns-api-openapi.yml
  - type: Documentation
    url: https://developer.sendoso.com/rest-api/overview/introduction
  - type: APIReference
    url: https://developer.sendoso.com/rest-api/reference/sends/get-sends
  - type: GettingStarted
    url: https://developer.sendoso.com/rest-api/overview/introduction
  - type: Authentication
    url: https://developer.sendoso.com/rest-api/overview/authentication
  - type: RateLimits
    url: https://developer.sendoso.com/rest-api/overview/rate-limits
  - type: Security
    url: https://developer.sendoso.com/rest-api/overview/security
  - type: FAQ
    url: https://developer.sendoso.com/rest-api/overview/faq
  - type: Webhooks
    url: https://developer.sendoso.com/webhooks/introduction
  - type: Documentation
    url: https://developer.sendoso.com/scim/overview/introduction
  - type: APIReference
    url: https://developer.sendoso.com/scim/reference/get-users
  - type: Authentication
    url: https://developer.sendoso.com/scim/overview/authentication
  - type: Security
    url: https://developer.sendoso.com/scim/overview/security
- aid: sendoso:sendoso-sends-api
  name: Sendoso Sends API
  description: Create and retrieve gift, direct mail and eGift sends.
  humanURL: https://developer.sendoso.com/rest-api/overview/introduction
  baseURL: https://app.sendoso.com/api/v3
  tags:
  - Sends
  properties:
  - type: OpenAPI
    url: openapi/sendoso-sends-api-openapi.yml
  - type: Documentation
    url: https://developer.sendoso.com/rest-api/overview/introduction
  - type: APIReference
    url: https://developer.sendoso.com/rest-api/reference/sends/get-sends
  - type: GettingStarted
    url: https://developer.sendoso.com/rest-api/overview/introduction
  - type: Authentication
    url: https://developer.sendoso.com/rest-api/overview/authentication
  - type: RateLimits
    url: https://developer.sendoso.com/rest-api/overview/rate-limits
  - type: Security
    url: https://developer.sendoso.com/rest-api/overview/security
  - type: FAQ
    url: https://developer.sendoso.com/rest-api/overview/faq
  - type: Webhooks
    url: https://developer.sendoso.com/webhooks/introduction
  - type: Documentation
    url: https://developer.sendoso.com/scim/overview/introduction
  - type: APIReference
    url: https://developer.sendoso.com/scim/reference/get-users
  - type: Authentication
    url: https://developer.sendoso.com/scim/overview/authentication
  - type: Security
    url: https://developer.sendoso.com/scim/overview/security
- aid: sendoso:sendoso-smartsend-api
  name: Sendoso Smart Send API
  description: AI-selected gift recommendations and sending them.
  humanURL: https://developer.sendoso.com/rest-api/overview/introduction
  baseURL: https://app.sendoso.com/api/v3
  tags:
  - SmartSend
  properties:
  - type: OpenAPI
    url: openapi/sendoso-smartsend-api-openapi.yml
  - type: Documentation
    url: https://developer.sendoso.com/rest-api/overview/introduction
  - type: APIReference
    url: https://developer.sendoso.com/rest-api/reference/sends/get-sends
  - type: GettingStarted
    url: https://developer.sendoso.com/rest-api/overview/introduction
  - type: Authentication
    url: https://developer.sendoso.com/rest-api/overview/authentication
  - type: RateLimits
    url: https://developer.sendoso.com/rest-api/overview/rate-limits
  - type: Security
    url: https://developer.sendoso.com/rest-api/overview/security
  - type: FAQ
    url: https://developer.sendoso.com/rest-api/overview/faq
  - type: Webhooks
    url: https://developer.sendoso.com/webhooks/introduction
  - type: Documentation
    url: https://developer.sendoso.com/scim/overview/introduction
  - type: APIReference
    url: https://developer.sendoso.com/scim/reference/get-users
  - type: Authentication
    url: https://developer.sendoso.com/scim/overview/authentication
  - type: Security
    url: https://developer.sendoso.com/scim/overview/security
- aid: sendoso:sendoso-teams-api
  name: Sendoso Teams API
  description: Team groups and their members.
  humanURL: https://developer.sendoso.com/rest-api/overview/introduction
  baseURL: https://app.sendoso.com/api/v3
  tags:
  - Team
  tags_raw:
  - Teams
  properties:
  - type: OpenAPI
    url: openapi/sendoso-teams-api-openapi.yml
  - type: Documentation
    url: https://developer.sendoso.com/rest-api/overview/introduction
  - type: APIReference
    url: https://developer.sendoso.com/rest-api/reference/sends/get-sends
  - type: GettingStarted
    url: https://developer.sendoso.com/rest-api/overview/introduction
  - type: Authentication
    url: https://developer.sendoso.com/rest-api/overview/authentication
  - type: RateLimits
    url: https://developer.sendoso.com/rest-api/overview/rate-limits
  - type: Security
    url: https://developer.sendoso.com/rest-api/overview/security
  - type: FAQ
    url: https://developer.sendoso.com/rest-api/overview/faq
  - type: Webhooks
    url: https://developer.sendoso.com/webhooks/introduction
  - type: Documentation
    url: https://developer.sendoso.com/scim/overview/introduction
  - type: APIReference
    url: https://developer.sendoso.com/scim/reference/get-users
  - type: Authentication
    url: https://developer.sendoso.com/scim/overview/authentication
  - type: Security
    url: https://developer.sendoso.com/scim/overview/security
- aid: sendoso:sendoso-users-api
  name: Sendoso Users API
  description: Read the authorized user, list organization users, invite new users.
  humanURL: https://developer.sendoso.com/rest-api/overview/introduction
  baseURL: https://app.sendoso.com/api/v3
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/sendoso-users-api-openapi.yml
  - type: Documentation
    url: https://developer.sendoso.com/rest-api/overview/introduction
  - type: APIReference
    url: https://developer.sendoso.com/rest-api/reference/sends/get-sends
  - type: GettingStarted
    url: https://developer.sendoso.com/rest-api/overview/introduction
  - type: Authentication
    url: https://developer.sendoso.com/rest-api/overview/authentication
  - type: RateLimits
    url: https://developer.sendoso.com/rest-api/overview/rate-limits
  - type: Security
    url: https://developer.sendoso.com/rest-api/overview/security
  - type: FAQ
    url: https://developer.sendoso.com/rest-api/overview/faq
  - type: Webhooks
    url: https://developer.sendoso.com/webhooks/introduction
  - type: Documentation
    url: https://developer.sendoso.com/scim/overview/introduction
  - type: APIReference
    url: https://developer.sendoso.com/scim/reference/get-users
  - type: Authentication
    url: https://developer.sendoso.com/scim/overview/authentication
  - type: Security
    url: https://developer.sendoso.com/scim/overview/security
common:
- type: Overlay
  url: overlays/sendoso-core-overlay.yaml
- type: Overlay
  url: overlays/sendoso-scim-overlay.yaml
- type: Website
  url: https://www.sendoso.com/
- type: DeveloperPortal
  url: https://developer.sendoso.com/
- type: Portal
  url: https://developer.sendoso.com/
- type: Documentation
  url: https://developer.sendoso.com/rest-api/overview/introduction
- type: APIReference
  url: https://developer.sendoso.com/rest-api/reference/sends/get-sends
- type: GettingStarted
  url: https://developer.sendoso.com/rest-api/overview/introduction
- type: Authentication
  url: authentication/sendoso-authentication.yml
- type: OAuthScopes
  url: scopes/sendoso-scopes.yml
- type: Conventions
  url: conventions/sendoso-conventions.yml
- type: Idempotency
  url: conventions/sendoso-conventions.yml
- type: RateLimits
  url: rate-limits/sendoso-rate-limits.yml
- type: ErrorCatalog
  url: errors/sendoso-problem-types.yml
- type: Lifecycle
  url: lifecycle/sendoso-lifecycle.yml
- type: Conformance
  url: conformance/sendoso-conformance.yml
- type: DataModel
  url: data-model/sendoso-data-model.yml
- type: Sandbox
  url: sandbox/sendoso-sandbox.yml
- type: Components
  url: components/sendoso-components.yml
- type: Plans
  url: plans/sendoso-plans-pricing.yml
- type: Packages
  url: packages/sendoso-packages.yml
- type: WellKnown
  url: well-known/sendoso-well-known.yml
- type: MCPServer
  url: mcp/sendoso-mcp.yml
- type: ToolCrosswalk
  url: mcp/sendoso-tool-crosswalk.yml
- type: AgentCard
  url: a2a/sendoso-a2a.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/sendoso-llms.txt
- type: LlmsText
  url: https://developer.sendoso.com/llms.txt
- type: AsyncAPI
  url: asyncapi/sendoso-webhooks-asyncapi.yml
- type: Webhooks
  url: asyncapi/sendoso-webhooks-asyncapi.yml
- type: DomainSecurity
  url: security/sendoso-domain-security.yml
- type: TrustCenter
  url: security/sendoso-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/sendoso-vulnerability-disclosure.yml
- type: SpectralRules
  url: rules/sendoso-rules.yml
- type: Vocabulary
  url: vocabulary/sendoso-vocabulary.yml
- type: HelpCenter
  url: https://support.sendoso.com/hc/en-us
- type: Support
  url: mailto:developers@sendoso.com
- type: Blog
  url: https://www.sendoso.com/blog
- type: Integrations
  url: https://www.sendoso.com/directory
- type: Pricing
  url: https://www.sendoso.com/compare-plans
- type: Login
  url: https://app.sendoso.com/login
- type: TermsOfService
  url: https://www.sendoso.com/terms
- type: PrivacyPolicy
  url: https://www.sendoso.com/privacy
- type: SecurityCenter
  url: https://security.sendoso.com/
- type: GitHubOrganization
  url: https://github.com/sendoso
- type: LinkedIn
  url: https://www.linkedin.com/company/sendoso
maintainers:
- FN: API Evangelist
  url: https://apievangelist.com
  email: info@apievangelist.com
x-provenance:
  checked: '2026-08-13'
  note: This profile was rebuilt from Sendoso's own published documentation at developer.sendoso.com. The five API entries
    it previously carried (Inventory, Recipients, Reports, Sends, Teams) and the OpenAPI documents behind them were an API
    Evangelist scaffold — wrong base path (/api/v2, which returns 404), wrong auth (X-Api-Key instead of OAuth 2.0), and not
    one real path. They and the eighteen artifacts derived from them are quarantined in _scaffold/ with a written record.
  openapi_provenance: 'Sendoso publishes no OpenAPI document. The three descriptions in openapi/ are generated by API Evangelist
    from Sendoso''s reference pages; each carries info.x-generated-from: documentation and a per-operation externalDocs URL
    back to the source page.'
  pointers_removed:
  - type: StatusPage
    url: https://status.sendoso.com/
    reason: Host does not answer over HTTP or HTTPS (probed 2026-08-13); the underlying Atlassian Statuspage at sendoso.statuspage.io
      reports INACTIVE.
  - type: TermsOfService
    url: https://sendoso.com/terms-of-service/
    reason: 404. Replaced with https://www.sendoso.com/terms.
  - type: PrivacyPolicy
    url: https://sendoso.com/privacy-policy/
    reason: 404. Replaced with https://www.sendoso.com/privacy.
  - type: PostmanWorkspace
    url: https://www.postman.com/kinlaneapi/sendoso/overview
    reason: Built from the scaffold collections and still serves invented /api/v2 requests. Needs rebuilding or unpublishing
      by hand before it is pointed at again.
  - types:
    - AgenticAccess
    - JSONSchema
    - JSONStructure
    - JSONLD
    - Examples
    reason: All derived from the scaffold OpenAPI and describing paths and fields that do not exist. Quarantined in _scaffold/.
  - type: FinOps
    url: finops/sendoso-finops.yml
    reason: Same 2026-05-04 scaffold pass. Asserted a "Usage-Based, Monthly, USD" billing model for a provider that publishes
      no prices at all. Quarantined in _scaffold/finops/.
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 31
  pass: local-v1
x-a2a:
  verified: true
  probed: '2026-09-26'
  url: https://developer.sendoso.com/.well-known/agent-card.json
  grade: conformant
  protocol_version: '0.3'
  control: 404

Sendoso API — frequently asked questions

Does Sendoso have an API?

Yes. APIs.io lists 8 APIs from Sendoso, including Sendoso Marketplace and SmartSend API, Sendoso Webhooks and Sendoso MCP Server, and 5 more.

Is there an OpenAPI specification for the Sendoso API?

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

How do I authenticate with the Sendoso API?

Sendoso documents its authentication (oauth2 · 1 scheme). The details are profiled on APIs.io as Sendoso Authentication.

How much does the Sendoso API cost?

Sendoso publishes its prices; its Start with Merch plan is Talk to sales as of 2026-10-28. APIs.io lists 5 pricing plans for Sendoso, with each plan's price, limits and inclusions under Pricing on this page.

Does Sendoso have an MCP server?

Yes. APIs.io lists 1 MCP server for Sendoso: Sendoso ships TWO remote MCP servers, and they are different products. The production server at https://app.sendoso.com/mcp is an OAuth-protected agent surface over the Sendoso platform itself — it an

Is the Sendoso API ready for AI agents?

Sendoso has a Kin Score of 58.1 out of 100 (strong) and an Agent Readiness score of 45.8 (agent-native), scored by API Evangelist on 2026-11-06.

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