> ## 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.
> Retrieves performance statistics for multiple campaigns in a single request.
# Get Batch Campaign Stats
Careful, the route starts with `/v2/`. Make sure to include the version in the path.
## OpenAPI
````yaml post /v2/campaigns/stats/batch
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: []
paths:
/v2/campaigns/stats/batch:
post:
tags:
- Campaigns
summary: Get Batch Campaign Stats
description: >-
Retrieve detailed statistics for multiple campaigns in a single request,
with filtering options by date, user, A/B testing, and communication
channels. Processes up to 100 campaigns per request.
requestBody:
required: true
content:
application/json:
schema:
type: object
required:
- campaignIds
- startDate
- endDate
properties:
campaignIds:
type: array
items:
type: string
minItems: 1
maxItems: 100
description: Array of campaign IDs to retrieve stats for
example:
- cam_123
- cam_456
startDate:
type: string
description: Start date in ISO 8601 format
example: '2024-01-07T22:00:00.000Z'
endDate:
type: string
description: End date in ISO 8601 format
example: '2025-07-10T21:59:59.999Z'
sendUser:
type: string
description: >-
Filter stats by send user. Format:
`sendUserId|sendUserEmail`. The sendUserId should begin with
'usr_' and the sendUserEmail should be a valid sender email.
If the param is specified, both sendUserId and sendUserEmail
are mandatory.
example: usr_OcIHizJyIeaDxicQP|email@example.com
ABSelected:
type: string
enum:
- A
- B
description: A/B version filter
channels:
type: array
items:
type: string
enum:
- email
- linkedin
- others
description: Filter by communication channels
responses:
'200':
description: Success
content:
application/json:
schema:
type: object
properties:
results:
type: array
description: Array of campaign stats results
items:
type: object
properties:
campaignId:
type: string
description: The campaign ID
nbLeads:
type: integer
description: Total number of leads in the campaign
nbLeadsLaunched:
type: integer
description: Number of leads launched in the campaign
nbLeadsReached:
type: integer
description: Number of leads that were successfully reached
nbLeadsOpened:
type: integer
description: Number of leads that opened messages
nbLeadsInteracted:
type: integer
description: >-
Number of leads that interacted with messages
(clicked, replied)
nbLeadsAnswered:
type: integer
description: Number of leads that answered
nbLeadsInterested:
type: integer
description: Number of leads marked as interested
nbLeadsNotInterested:
type: integer
description: Number of leads marked as not interested
nbLeadsUnsubscribed:
type: integer
description: Number of leads that unsubscribed
nbLeadsInterrupted:
type: integer
description: Number of leads with interrupted sequences
messagesSent:
type: integer
description: Total number of messages sent
messagesNotSent:
type: integer
description: Number of messages that failed to send
messagesBounced:
type: integer
description: Number of messages that bounced
delivered:
type: integer
description: Number of messages successfully delivered
opened:
type: integer
description: Number of messages opened
clicked:
type: integer
description: Number of messages with clicks
replied:
type: integer
description: Number of messages that received replies
invitationAccepted:
type: integer
description: Number of LinkedIn invitations accepted
meetingBooked:
type: integer
description: Number of meetings booked
steps:
type: array
description: Detailed metrics for each step in the campaign
items:
type: object
properties:
index:
type: integer
description: Step index in the sequence
sequenceId:
type: string
description: ID of the sequence
sequenceStep:
type: integer
description: Step number within the sequence
abTest:
type: string
description: A/B test variant (if applicable)
taskType:
type: string
description: Type of task
enum:
- email
- linkedinVisit
- linkedinInvite
- linkedinSend
- phone
- manual
- conditional
conditionLabel:
type: string
description: Label for conditional steps
invited:
type: integer
description: Number of LinkedIn invitations sent
sent:
type: integer
description: Number of messages sent
delivered:
type: integer
description: Number of messages delivered
opened:
type: integer
description: Number of messages opened
clicked:
type: integer
description: Number of clicks from a message from this step
replied:
type: integer
description: Number of replies
notDelivered:
type: integer
description: Number of messages not delivered
bounced:
type: integer
description: Number of messages bounced
unsubscribed:
type: integer
description: Number of unsubscribes from this step
errors:
type: array
description: >-
Array of errors for campaigns that failed to retrieve
stats
items:
type: object
properties:
campaignId:
type: string
description: The campaign ID that failed
error:
type: string
description: Error message
example:
results:
- campaignId: cam_123
nbLeads: 32
nbLeadsLaunched: 32
nbLeadsReached: 32
nbLeadsOpened: 31
nbLeadsInteracted: 4
nbLeadsAnswered: 16
nbLeadsInterested: 1
nbLeadsNotInterested: 0
nbLeadsUnsubscribed: 1
nbLeadsInterrupted: 1
messagesSent: 72
messagesNotSent: 0
messagesBounced: 0
delivered: 72
opened: 47
clicked: 4
replied: 16
invitationAccepted: 0
meetingBooked: 0
steps:
- index: 1
sequenceId: seq_rH5RD3fMkkt2gM3YC
sequenceStep: 0
taskType: linkedinSend
invited: 0
sent: 32
delivered: 32
opened: 15
clicked: 0
replied: 15
notDelivered: 0
bounced: 0
unsubscribed: 1
errors: []
'400':
description: Bad request - Invalid parameters
content:
text/plain:
examples:
emptyCampaignIds:
summary: Empty campaign IDs
value: 'Bad params: campaignIds must be a non-empty array'
tooManyCampaignIds:
summary: Too many campaign IDs
value: 'Bad params: campaignIds must contain at most 100 items'
missingDates:
summary: Missing dates
value: 'Bad params: startDate and endDate are required'
invalidChannels:
summary: Invalid channels
value: >-
Bad params: channels must be an array of "others", "email"
or "linkedin"
invalidAB:
summary: Invalid A/B selection
value: 'Bad params: ABSelected must be A or B'
invalidSendUserFormat:
summary: Invalid send user format
value: >-
Bad param format: sendUser must be formatted as follow:
|
invalidSendUser:
summary: Send user email mismatch
value: >-
Bad params: the send user email is not related to the send
user id
'401':
description: Unauthorized
'405':
description: Method not allowed
content:
text/plain:
example: Bad method
components:
securitySchemes:
basicAuth:
type: http
scheme: basic
````