# Vessel Engagement API (v1, legacy)

**Canonical:** https://apis.io/apis/vessel/engagement-api-v1/  
**Provider:** Vessel — https://apis.io/providers/vessel/  
**Base URL:** https://api.vessel.land  
**Documentation:** https://www.vessel.dev/

Vessel Engagement API (v1, legacy) is one of 20 APIs that [Vessel](https://apis.io/providers/vessel/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Sales Engagement, Legacy, v1, Sequences, and Mailboxes. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an API reference, and a GitHub repository.

The first-generation Vessel Sales Engagement API, published under /engagement/* on api.vessel.land. Covers users, accounts, contacts, tasks, actions, calls, emails, call dispositions, sequences, sequence steps and mailboxes, plus the Link and connection endpoints. Superseded by the v2 engagement unification surface. Published by Vessel as OpenAPI 3.1.0 with 44 operations.

## Machine-readable artifacts (5)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/vessel/refs/heads/main/openapi/vessel-engagement-v1-openapi.yml
- **Documentation** — https://github.com/vesselapi/all-api-docs
- **APIReference** — https://github.com/vesselapi/all-api-docs/tree/main/docs/pages
- **GitHubRepository** — https://github.com/vesselapi/all-api-docs
- **SpectralRuleset** — https://raw.githubusercontent.com/api-evangelist/vessel/refs/heads/main/rules/vessel-api-rules.yml

## Other Vessel APIs (12)

- [Vessel Platform API](https://apis.io/apis/vessel/platform-api/)
- [Vessel CRM Unified API](https://apis.io/apis/vessel/crm-unified-api/)
- [Vessel Sales Engagement Unified API](https://apis.io/apis/vessel/engagement-unified-api/)
- [Vessel Chat Unified API](https://apis.io/apis/vessel/chat-unified-api/)
- [Vessel Dialer Unified API](https://apis.io/apis/vessel/dialer-unified-api/)
- [Vessel Marketing Automation Unified API](https://apis.io/apis/vessel/marketing-automation-unified-api/)
- [Vessel CRM API (v1, legacy)](https://apis.io/apis/vessel/crm-api-v1/)
- [Vessel Salesforce Actions API](https://apis.io/apis/vessel/salesforce-actions-api/)
- [Vessel Slack Actions API](https://apis.io/apis/vessel/slack-actions-api/)
- [Vessel Microsoft Teams Actions API](https://apis.io/apis/vessel/teams-actions-api/)
- [Vessel Outreach Actions API](https://apis.io/apis/vessel/outreach-actions-api/)
- [Vessel Salesloft Actions API](https://apis.io/apis/vessel/salesloft-actions-api/)

## Tags

Sales Engagement, Legacy, v1, Sequences, Mailboxes

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/vessel/engagement-api-v1/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/vessel/.