> ## Documentation Index
> Fetch the complete documentation index at: https://developer.lemlist.com/llms.txt
> Use this file to discover all available pages before exploring further.
> Returns the sender pool of a campaign, as the campaign editor shows it.
# Get Campaign Senders
The sender pool requires at least the **Email Pro** plan.
To pin the sender of one step, outside the pool, see
[Set Step Sender](/api-reference/endpoints/sequences/set-step-sender) in the
Sequences group.
The sender pool is the list of senders and channels that a campaign enables.
The campaign gives each lead one sender of the pool.
* `readOnly: true` means that the campaign uses a dynamic sender strategy
(`contactOwner`, `leadImporter` or `customField:`): the leads
select the senders, and the write endpoints answer `409`.
* A sender forced on a step shows in the pool with its forced channel, even
when the sender is not in the pool.
* `senders[].channels[]` without `label`, `esp` and `diagnostics` is a
valid `channels` list for the write endpoints.
## Diagnostics
Each sender, each channel and the pool carry `diagnostics`. An `error` blocks
the sending. A `warning` or an `info` does not.
| `code` | `scope` | `type` | Meaning |
| - | - | - | - |
| `channel_missing` | channel | error | A step needs a channel type that the sender does not have. |
| `channel_disconnected` | channel | error | The account is disconnected. |
| `channel_linked_elsewhere` | channel | error | The LinkedIn profile is active on another lemlist account. |
| `channel_issue` | channel | error | The mailbox has an error. `message` gives the error. |
| `channel_not_required` | channel | info | No step uses this channel type. The channel sends nothing. |
| `no_required_channel_active` | user | error | The sender has no enabled channel of a channel type that a step uses. |
| `license_missing` | user | warning | The user has no active seat. |
| `sender_paused` | user | info | The user paused their sending for a date range. The sending starts again after. |
| `no_account_connected` | global | info | Nobody in the team has an account of a channel type that a step uses. |
| `no_sender_enabled` | global | error | The pool is empty, and a step needs a sender. |
## OpenAPI
````yaml get /campaigns/{campaignId}/senders
openapi: 3.0.0
info:
title: lemlist API
version: 1.0.0
description: >-
Welcome to the lemlist Developer Documentation.
lemlist is very customizable and open. You'll find on this page all the API
and integration you can do with lemlist.
# Rate Limit
lemlist's API rate limits requests in order to prevent abuse and overload of
our services.
Rate limits are applied on all routes and per API key performing the
request.
The rate limits are **20** requests per **2** seconds.
The response provides any information you may need about it:
| Header | Description |
| --- | --- |
| Retry-After | The number of seconds in which you can retry |
| X-RateLimit-Limit | The maximum requests in that time |
| X-RateLimit-Remaining | The number of remaining requests you can make |
| X-RateLimit-Reset | The date when the rate limit will reset |
_Example of values for the rate limit headers_
``` json
{
"Retry-After": 2,
"X-RateLimit-Limit": 20,
"X-RateLimit-Remaining": 7,
"X-RateLimit-Reset" : "Tue Feb 16 2021 09:02:42 GMT+0100 (Central European Standard Time)"
}
```
# Definitions
## Team
A team is the entity of lemlist that can handle users and billing.
## Credits
Credits are the coins a team uses to enrich emails, LinkedIn URLs, etc. via
the enrich route. Each enrichment feature needs a certain amount of credits
to run.
## User
You use a user account to connect to lemlist and send messages via the
connected emails or LinkedIn account.
## Campaign
A campaign is the entity to automate outreach. A campaign has multiple
sequences composed of steps.
## Lead
A lead is a person that you try to contact via a campaign.
## Activity
An activity is the history of all the steps.
## Unsubscribe
An unsubscribe occurs when a person decides they don't want to receive
emails from you anymore.
# Authentication
All API routes use the dedicated subdomain `api.lemlist.com`.
lemlist uses API keys to allow access to the API. You can get your lemlist
API key at our [integration
page](https://app.lemlist.com/settings/integrations).
You need to add the `Authorization` header using the `Basic` authentication
type. `login:password` **where the login is always empty and the password is
the API key**.
⚠️ **Don't forget to add the semicolon (**`:`**) before your API key in curl
command.**
> To authorize, use this code:
``` shell
curl https://api.lemlist.com/api/team \
--user ":YourApiKey"
```
**Make sure to replace** **`YourApiKey`** **with your API key.**
# Give feedback
If you want to report a bug, ask for data, or share with us a use case,
please fill this [form](https://lemlist.typeform.com/to/mfVlkyGf). It will
help us centralize your needs!
servers:
- url: https://api.lemlist.com/api
security:
- basicAuth: []
tags:
- name: Enrichment Providers
description: >-
The data providers lemlist can call to find an email or a phone.
Internal providers are paid with lemlist credits and always available.
External providers run on your own account: connect one by saving its API
key, and it becomes available to your waterfalls. `GET
/enrichments/providers` is the catalog of provider ids accepted by the
waterfall endpoints.
- name: Enrichment Waterfalls
description: >-
Control which data providers lemlist calls when enriching a contact, and
in which order.
A waterfall is an ordered list of providers for one enrichment `type`
(`email` or `phone`). Providers are tried one after the other until one
returns a result.
Every team has exactly one default waterfall per type (`isDefault: true`).
While its `editor` is `lemlist` it follows the lemlist behaviour:
providers you connected with your own API key are tried first, then
internal providers in a random order. Once a team member edits its
provider list, `editor` becomes that user's id and the list is followed as
is; resetting it hands it back to `lemlist`.
Custom waterfalls (`isDefault: false`) carry `conditions` on the contact
being enriched, keyed by contact property; every key present must match.
When a contact is enriched, lemlist runs a single waterfall: the custom
waterfall of the requested type whose conditions match the contact, or the
default waterfall when none does. If several match, the one with the most
condition keys wins, then the most recently updated. Only that waterfall
runs; when it finds nothing, the enrichment ends without falling back to
another one.
paths:
/campaigns/{campaignId}/senders:
parameters:
- name: campaignId
in: path
required: true
description: The unique identifier of the campaign
example: cam_A1b2C3d4E5f6G7h8M
schema:
type: string
get:
tags:
- Senders
summary: Get Campaign Senders
description: >-
Returns the sender pool of a campaign, as the campaign editor shows it:
each sender with its enabled channels and their diagnostics. Requires
the Email Pro plan.
parameters: []
responses:
'200':
description: Success
content:
application/json:
schema:
type: object
properties:
data:
$ref: '#/components/schemas/SenderPool'
example:
data:
campaignId: cam_A1b2C3d4E5f6G7h8M
senderStrategy: random
espMatching: false
readOnly: false
senders:
- userId: usr_A1b2C3d4E5f6G7h8K
name: John Doe
email: john@example.com
channels:
- type: email
id: usm_A1b2C3d4E5f6G7h8L
label: john@example.com
alias: john@example.com
esp: google
diagnostics: []
diagnostics:
- scope: user
type: warning
code: license_missing
diagnostics: []
'400':
description: Malformed campaign id
content:
application/json:
schema:
type: object
properties:
error:
type: string
description: Human-readable error message
code:
type: string
description: Machine-readable error code
example:
error: Wrong param campaign id
code: WRONG_PARAM_CAMPAIGN_ID
'401':
description: The authentication you supplied is incorrect
content:
text/plain:
example: The authentication you supplied is incorrect
'402':
description: The sender pool requires at least the Email Pro plan
content:
text/plain:
example: route is available starting emailPro plan
'404':
description: Campaign not found
content:
application/json:
schema:
type: object
properties:
error:
type: string
description: Human-readable error message
code:
type: string
description: Machine-readable error code
example:
error: Campaign not found
code: SENDER_CAMPAIGN_NOT_FOUND
'405':
description: Method not allowed
content:
application/json:
schema:
type: object
properties:
error:
type: string
description: Human-readable error message
code:
type: string
description: Machine-readable error code
example:
error: Route bad method
code: ROUTE_BAD_METHOD
components:
schemas:
SenderPool:
type: object
description: The sender pool of a campaign, as the campaign editor shows it.
properties:
campaignId:
type: string
senderStrategy:
type: string
description: >-
`random`, or a dynamic strategy: `contactOwner`, `leadImporter` or
`customField:`.
espMatching:
type: boolean
description: >-
`true` when a lead gets a mailbox of the same provider as its
address, when the pool has one.
readOnly:
type: boolean
description: '`true` for a dynamic sender strategy: the leads select the senders.'
senders:
type: array
items:
type: object
properties:
userId:
type: string
name:
type: string
email:
type: string
channels:
type: array
description: >-
The enabled channels. Remove `label`, `esp` and `diagnostics`
to get a valid `channels` entry of the request bodies.
items:
type: object
properties:
type:
type: string
enum:
- email
- linkedin
- whatsapp
- phone
id:
type: string
description: >-
The mailbox id, the WhatsApp account id, the phone
number, or the user id for LinkedIn.
label:
type: string
alias:
type: string
description: 'Email only: the address the mailbox sends as.'
esp:
type: string
enum:
- google
- microsoft
- smtp
description: 'Email only: the provider of the mailbox.'
diagnostics:
type: array
description: >-
The problems that block or limit the sending. See [Get
Campaign
Senders](/api-reference/endpoints/senders/get-campaign-senders#diagnostics).
items:
$ref: '#/components/schemas/SenderDiagnostic'
diagnostics:
type: array
description: >-
The problems that block or limit the sending. See [Get
Campaign
Senders](/api-reference/endpoints/senders/get-campaign-senders#diagnostics).
items:
$ref: '#/components/schemas/SenderDiagnostic'
diagnostics:
type: array
description: >-
The problems of the whole pool, for example no account of a required
channel type in the team.
items:
$ref: '#/components/schemas/SenderDiagnostic'
SenderDiagnostic:
type: object
description: One health problem of a sender, a channel or the whole pool.
properties:
scope:
type: string
enum:
- channel
- user
- step
- global
description: >-
What the problem is about: one channel, one sender, one step or the
whole pool.
type:
type: string
enum:
- error
- warning
- info
description: '`error` blocks the sending. `warning` and `info` do not.'
code:
type: string
enum:
- channel_missing
- channel_disconnected
- channel_linked_elsewhere
- channel_issue
- channel_not_required
- license_missing
- no_required_channel_active
- no_account_connected
- no_sender_enabled
- sender_paused
message:
type: string
description: More details, for example the error of a mailbox.
channelType:
type: string
enum:
- email
- linkedin
- whatsapp
- phone
description: >-
The channel type of the problem. Absent when the problem is not
about one channel type.
securitySchemes:
basicAuth:
type: http
scheme: basic
````
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