# Vessel **Canonical:** https://apis.io/providers/vessel/ **Website:** https://www.vessel.dev/ **APIs profiled:** 20 Vessel (Kinit Inc.) is a developer-first embedded integrations platform for go-to-market software. It gives a product team one contract to read and write an end customer's CRM, sales engagement, chat, dialer and marketing automation tools, plus a drop-in browser component — Vessel Link — that handles the end user's authorization so the host application never touches downstream credentials. Three modules sit on an open-source integrations library: Unification (one normalized schema per vertical), Actions (typed, validated wrappers over a single provider's native API), and Managed ETL. An /api/passthrough endpoint forwards arbitrary authenticated requests for anything the modules do not cover. Vessel publishes 20 OpenAPI 3.1.0 definitions covering 376 operations in its own documentation repository. As of 2026-08-13 those contracts are still public but the operational surface is not: api.vessel.dev does not answer, api.vessel.land has no DNS record, and both docs.vessel.dev and app.vessel.dev are unreachable. ## Kin Score — 72.6 / 100 (exemplar) Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+1.1 from 71.5). | Facet | Score | |---|---| | Discoverability | 81.5 | | Contract Quality | 62.0 | | Governance | 100.0 | | Contract Governance | 100.0 | | Operational Transparency | 50.0 | | Developer Ergonomics | 73.2 | | Commercial Clarity | 78.9 | | Access Clarity | 78.9 | ## Agent readiness — 44.7 (agent-ready) | Dimension | Value | |---|---| | Spec Presence | yes | | Agentic Access | derived | | Reversibility Documented | no | | MCP Server | no | | Auth Clarity | yes | | Idempotency | no | | Error Semantics | documented | | OpenAPI Examples | verified | | Rate Limit Signal | documented | | Event Surface Described | yes | | Agent Skills | derived | | Well Known Catalog | no | | Consent Identity | no | | Agent Card | no | | Dry Run Mode | no | ## Access Paid · Self-serve signup — onboarding: self-serve, pricing: paid, trial: no (confidence: high). ## APIs (20) - **Vessel Platform API** — The Vessel Platform API is the control plane of the Vessel embedded integrations platform. It covers the Link authentication handshake (session tokens and access tokens), the ca... - **Vessel CRM Unified API** — The Vessel CRM Unified API (v2) normalizes CRM objects across Salesforce, HubSpot, Zoho, Pipedrive, Close, Freshsales, Microsoft Dynamics, Affinity and monday.com behind a singl... - **Vessel Sales Engagement Unified API** — The Vessel Sales Engagement Unified API normalizes sales engagement objects across Outreach, Salesloft, Apollo and similar tools under /api/unifications/engagement, covering use... - **Vessel Chat Unified API** — The Vessel Chat Unified API normalizes chat platform objects across Slack and Microsoft Teams under /api/unifications/chat, providing a single interface for channels, messages a... - **Vessel Dialer Unified API** — The Vessel Dialer Unified API normalizes telephony/dialer objects across Aircall, Dialpad and RingCentral under /api/unifications/dialer, covering calls, call recordings, users ... - **Vessel Marketing Automation Unified API** — The Vessel Marketing Automation Unified API normalizes marketing automation objects across Mailchimp, ActiveCampaign and Customer.io under /api/unifications/marketing, covering ... - **Vessel CRM API (v1, legacy)** — The first-generation Vessel CRM API, published under /crm/* with the vessel-api-token header and an accessToken query/body parameter. Superseded by the v2 unified CRM API under ... - **Vessel Engagement API (v1, legacy)** — The first-generation Vessel Sales Engagement API, published under /engagement/* on api.vessel.land. Covers users, accounts, contacts, tasks, actions, calls, emails, call disposi... - **Vessel Salesforce Actions API** — The Vessel Actions API for Salesforce — typed, validated wrappers over Salesforce's native API served under /api/actions/salesforce. Actions add request/response schema validati... - **Vessel Slack Actions API** — The Vessel Actions API for Slack — typed, validated wrappers over Slack's native API served under /api/actions/slack. Actions add request/response schema validation, standardize... - **Vessel Microsoft Teams Actions API** — The Vessel Actions API for Microsoft Teams — typed, validated wrappers over Microsoft Teams's native API served under /api/actions/teams. Actions add request/response schema val... - **Vessel Outreach Actions API** — The Vessel Actions API for Outreach — typed, validated wrappers over Outreach's native API served under /api/actions/outreach. Actions add request/response schema validation, st... - **Vessel Salesloft Actions API** — The Vessel Actions API for Salesloft — typed, validated wrappers over Salesloft's native API served under /api/actions/salesloft. Actions add request/response schema validation,... - **Vessel Apollo Actions API** — The Vessel Actions API for Apollo — typed, validated wrappers over Apollo's native API served under /api/actions/apollo. Actions add request/response schema validation, standard... - **Vessel Aircall Actions API** — The Vessel Actions API for Aircall — typed, validated wrappers over Aircall's native API served under /api/actions/aircall. Actions add request/response schema validation, stand... - **Vessel Dialpad Actions API** — The Vessel Actions API for Dialpad — typed, validated wrappers over Dialpad's native API served under /api/actions/dialpad. Actions add request/response schema validation, stand... - **Vessel RingCentral Actions API** — The Vessel Actions API for RingCentral — typed, validated wrappers over RingCentral's native API served under /api/actions/ringcentral. Actions add request/response schema valid... - **Vessel Mailchimp Actions API** — The Vessel Actions API for Mailchimp — typed, validated wrappers over Mailchimp's native API served under /api/actions/mailchimp. Actions add request/response schema validation,... - **Vessel ActiveCampaign Actions API** — The Vessel Actions API for ActiveCampaign — typed, validated wrappers over ActiveCampaign's native API served under /api/actions/activecampaign. Actions add request/response sch... - **Vessel monday.com Actions API** — The Vessel Actions API for monday.com — typed, validated wrappers over monday.com's native API served under /api/actions/monday. Actions add request/response schema validation, ... ## Agentic access (1) - **Vessel Agentic Access** — 376 operations · 304 acting ## Security (2) - **Vessel Authentication** — apiKey · 4 schemes - **Vessel Domain Security** — TLSv1.3 · DMARC ## Plans (1) - **Vessel Plans Pricing** ## Tags CRM, Chat, Dialer, Embedded Integrations, Go-To-Market, Integration, iPaaS, Marketing Automation, Sales Engagement, Unified-API, Webhook --- Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/vessel/). Scores are computed from the provider's own public artifacts under a published rubric.