# lemlist Signal Agents API

**Canonical:** https://apis.io/apis/lemlist/lemlist-signal-agents-api/  
**Provider:** lemlist — https://apis.io/providers/lemlist/  
**Base URL:** https://api.lemlist.com/api  
**Documentation:** https://developer.lemlist.com/api-reference/endpoints/watch-list/list-watch-lists

lemlist Signal Agents API is one of 22 APIs that [lemlist](https://apis.io/providers/lemlist/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Signal Agents and Buying Signals. The published artifact set on APIs.io includes an OpenAPI specification.

Signal Agents (watch lists) - create and configure watches, list the available signal types and filters, read detected signals, and push external signals.

## Operations (10)

| Method | Path | Summary |
|---|---|---|
| GET | `/watchlist/signals` | Get Signal Agent signals |
| POST | `/watchlist/{watchListId}/external-signals` | Push external signals |
| GET | `/watchlist` | List Signal Agents |
| POST | `/watchlist` | Create Signal Agent |
| PATCH | `/watchlist` | Update Signal Agent |
| DELETE | `/watchlist` | Delete Signal Agent |
| GET | `/watchlist/history` | Get Signal Agent configuration history |
| GET | `/watchlist/library` | List available signal types |
| GET | `/watchlist/filters` | List allowed filters per signal type |
| GET | `/watchlist/filter-values` | Autocomplete filter values |

## Machine-readable artifacts (1)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/lemlist/refs/heads/main/openapi/lemlist-signal-agents-api-openapi.yml

## Other lemlist APIs (12)

- [lemlist MCP Server](https://apis.io/apis/lemlist/mcp-server/)
- [lemlist Campaigns API](https://apis.io/apis/lemlist/lemlist-campaigns-api/)
- [lemlist Sequences API](https://apis.io/apis/lemlist/lemlist-sequences-api/)
- [lemlist Leads API](https://apis.io/apis/lemlist/lemlist-leads-api/)
- [lemlist People Database API](https://apis.io/apis/lemlist/lemlist-people-database-api/)
- [lemlist Enrich API](https://apis.io/apis/lemlist/lemlist-enrich-api/)
- [lemlist Inbox API](https://apis.io/apis/lemlist/lemlist-inbox-api/)
- [lemlist Contacts API](https://apis.io/apis/lemlist/lemlist-contacts-api/)
- [lemlist Companies API](https://apis.io/apis/lemlist/lemlist-companies-api/)
- [lemlist Webhooks API](https://apis.io/apis/lemlist/lemlist-webhooks-api/)
- [lemlist Unsubscribes API](https://apis.io/apis/lemlist/lemlist-unsubscribes-api/)
- [lemlist Schedules API](https://apis.io/apis/lemlist/lemlist-schedules-api/)

## Tags

Signal Agents, Buying Signals

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