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API Reference
Sender

Update a sender

POST/v1/senders/{id}

Replaces a sender’s pacing and returns the updated sender. Send exactly the sender’s step types, with every value: read the sender first to change only some of them. Concurrent updates are last-write-wins.

Each step type must stay within the ceilings the workspace’s own limits have, and maxGapSeconds can’t be below minGapSeconds: EMAIL on an OAuth sender dailyLimit at least 1 and gaps 60 to 3600 seconds; EMAIL on an SMTP sender dailyLimit 1 to 100 and gaps 60 to 3600 seconds; LINKEDIN_INVITE dailyLimit 1 to 30 and gaps 120 to 3600 seconds; LINKEDIN_MESSAGE dailyLimit 1 to 60 and gaps 120 to 3600 seconds. Out-of-range values, or step types the sender doesn’t send, return 400.

Returns 409 if the sender is archived; archived senders can be read but not updated.

Required scope: senders:update

Rate limit category: Write

Path ParametersExpand Collapse
id: string

Unique identifier of the sender to update.

Body ParametersJSONExpand Collapse
pacing: object { EMAIL, LINKEDIN_INVITE, LINKEDIN_MESSAGE }

The sender’s new pacing, replacing all of its current values. Send exactly the step types the sender’s channel sends: EMAIL for an email sender; LINKEDIN_INVITE and LINKEDIN_MESSAGE for a LinkedIn sender.

EMAIL: optional object { dailyLimit, maxGapSeconds, minGapSeconds }

Email steps. Present only on an email sender.

dailyLimit: number

Most sends of this step type in any rolling 24 hours.

minimum-9007199254740991
maximum9007199254740991
maxGapSeconds: number

Upper bound of the minimum spacing, in seconds. Before each send, a minimum spacing is drawn at random between minGapSeconds and this value, and the send waits until that long after the previous one. Sends can be further apart, for example outside the send window or once dailyLimit is reached. Null means the minimum spacing is always minGapSeconds.

minimum-9007199254740991
maximum9007199254740991
minGapSeconds: number

Lower bound of the minimum spacing between two of its sends, in seconds.

minimum-9007199254740991
maximum9007199254740991
LINKEDIN_INVITE: optional object { dailyLimit, maxGapSeconds, minGapSeconds }

LinkedIn connection requests. Present only on a LinkedIn sender.

dailyLimit: number

Most sends of this step type in any rolling 24 hours.

minimum-9007199254740991
maximum9007199254740991
maxGapSeconds: number

Upper bound of the minimum spacing, in seconds. Before each send, a minimum spacing is drawn at random between minGapSeconds and this value, and the send waits until that long after the previous one. Sends can be further apart, for example outside the send window or once dailyLimit is reached. Null means the minimum spacing is always minGapSeconds.

minimum-9007199254740991
maximum9007199254740991
minGapSeconds: number

Lower bound of the minimum spacing between two of its sends, in seconds.

minimum-9007199254740991
maximum9007199254740991
LINKEDIN_MESSAGE: optional object { dailyLimit, maxGapSeconds, minGapSeconds }

LinkedIn messages. Present only on a LinkedIn sender.

dailyLimit: number

Most sends of this step type in any rolling 24 hours.

minimum-9007199254740991
maximum9007199254740991
maxGapSeconds: number

Upper bound of the minimum spacing, in seconds. Before each send, a minimum spacing is drawn at random between minGapSeconds and this value, and the send waits until that long after the previous one. Sends can be further apart, for example outside the send window or once dailyLimit is reached. Null means the minimum spacing is always minGapSeconds.

minimum-9007199254740991
maximum9007199254740991
minGapSeconds: number

Lower bound of the minimum spacing between two of its sends, in seconds.

minimum-9007199254740991
maximum9007199254740991
ReturnsExpand Collapse
SenderUpdateResponse object { id, archivedAt, channel, 9 more }
id: string

Unique identifier of the sender.

archivedAt: string

When the sender was archived, or null if it is active. Archived senders never send.

channel: "EMAIL" or "LINKEDIN"

Whether this sender sends email or LinkedIn messages.

One of the following:
"EMAIL"
"LINKEDIN"
createdAt: string

When the sender was created.

emailAddress: string

The address email from this sender is sent from. Null for LinkedIn senders, or when the connected account has no address.

health: "UNVERIFIED" or "HEALTHY" or "UNHEALTHY"

HEALTHY can send. UNHEALTHY cannot send until healthReason is resolved. UNVERIFIED means no health verdict yet: an email sender in this state cannot send until it passes a health check, while a LinkedIn sender is never health-checked, so a working LinkedIn sender is usually UNVERIFIED and can send.

One of the following:
"UNVERIFIED"
"HEALTHY"
"UNHEALTHY"
healthReason: string

Why the sender is UNHEALTHY or UNVERIFIED, for example ACCOUNT_DISCONNECTED, BOUNCE_THRESHOLD or INVITE_LIMIT; null when healthy.

objectType: "sender"

Always sender.

owner: string

Member ID of the person who owns this sender, or null when no workspace membership can be resolved.

pacing: object { EMAIL, LINKEDIN_INVITE, LINKEDIN_MESSAGE }

How this sender paces each step type it sends, keyed by sequence step type: EMAIL for an email sender; LINKEDIN_INVITE and LINKEDIN_MESSAGE for a LinkedIn sender.

EMAIL: optional object { dailyLimit, maxGapSeconds, minGapSeconds }

Email steps. Present only on an email sender.

dailyLimit: number

Most sends of this step type in any rolling 24 hours.

minimum-9007199254740991
maximum9007199254740991
maxGapSeconds: number

Upper bound of the minimum spacing, in seconds. Before each send, a minimum spacing is drawn at random between minGapSeconds and this value, and the send waits until that long after the previous one. Sends can be further apart, for example outside the send window or once dailyLimit is reached. Null means the minimum spacing is always minGapSeconds.

minimum-9007199254740991
maximum9007199254740991
minGapSeconds: number

Lower bound of the minimum spacing between two of its sends, in seconds.

minimum-9007199254740991
maximum9007199254740991
LINKEDIN_INVITE: optional object { dailyLimit, maxGapSeconds, minGapSeconds }

LinkedIn connection requests. Present only on a LinkedIn sender.

dailyLimit: number

Most sends of this step type in any rolling 24 hours.

minimum-9007199254740991
maximum9007199254740991
maxGapSeconds: number

Upper bound of the minimum spacing, in seconds. Before each send, a minimum spacing is drawn at random between minGapSeconds and this value, and the send waits until that long after the previous one. Sends can be further apart, for example outside the send window or once dailyLimit is reached. Null means the minimum spacing is always minGapSeconds.

minimum-9007199254740991
maximum9007199254740991
minGapSeconds: number

Lower bound of the minimum spacing between two of its sends, in seconds.

minimum-9007199254740991
maximum9007199254740991
LINKEDIN_MESSAGE: optional object { dailyLimit, maxGapSeconds, minGapSeconds }

LinkedIn messages. Present only on a LinkedIn sender.

dailyLimit: number

Most sends of this step type in any rolling 24 hours.

minimum-9007199254740991
maximum9007199254740991
maxGapSeconds: number

Upper bound of the minimum spacing, in seconds. Before each send, a minimum spacing is drawn at random between minGapSeconds and this value, and the send waits until that long after the previous one. Sends can be further apart, for example outside the send window or once dailyLimit is reached. Null means the minimum spacing is always minGapSeconds.

minimum-9007199254740991
maximum9007199254740991
minGapSeconds: number

Lower bound of the minimum spacing between two of its sends, in seconds.

minimum-9007199254740991
maximum9007199254740991
replyToAddress: string

SMTP senders only: the connected mailbox replies are sent to and read from. Null for other senders.

transport: "SMTP" or "OAUTH"

How an email sender sends: SMTP through its own mail server, OAUTH through its connected Google or Microsoft account. Null for LinkedIn senders.

One of the following:
"SMTP"
"OAUTH"

Update a sender

curl https://api.lightfield.app/v1/senders/$ID \
    -H 'Content-Type: application/json' \
    -H 'Lightfield-Version: 2026-03-01' \
    -H "Authorization: Bearer $API_KEY" \
    -d '{
          "pacing": {}
        }'
{
  "id": "id",
  "archivedAt": "archivedAt",
  "channel": "EMAIL",
  "createdAt": "createdAt",
  "emailAddress": "emailAddress",
  "health": "UNVERIFIED",
  "healthReason": "healthReason",
  "objectType": "sender",
  "owner": "owner",
  "pacing": {
    "EMAIL": {
      "dailyLimit": -9007199254740991,
      "maxGapSeconds": -9007199254740991,
      "minGapSeconds": -9007199254740991
    },
    "LINKEDIN_INVITE": {
      "dailyLimit": -9007199254740991,
      "maxGapSeconds": -9007199254740991,
      "minGapSeconds": -9007199254740991
    },
    "LINKEDIN_MESSAGE": {
      "dailyLimit": -9007199254740991,
      "maxGapSeconds": -9007199254740991,
      "minGapSeconds": -9007199254740991
    }
  },
  "replyToAddress": "replyToAddress",
  "transport": "SMTP"
}
Returns Examples
{
  "id": "id",
  "archivedAt": "archivedAt",
  "channel": "EMAIL",
  "createdAt": "createdAt",
  "emailAddress": "emailAddress",
  "health": "UNVERIFIED",
  "healthReason": "healthReason",
  "objectType": "sender",
  "owner": "owner",
  "pacing": {
    "EMAIL": {
      "dailyLimit": -9007199254740991,
      "maxGapSeconds": -9007199254740991,
      "minGapSeconds": -9007199254740991
    },
    "LINKEDIN_INVITE": {
      "dailyLimit": -9007199254740991,
      "maxGapSeconds": -9007199254740991,
      "minGapSeconds": -9007199254740991
    },
    "LINKEDIN_MESSAGE": {
      "dailyLimit": -9007199254740991,
      "maxGapSeconds": -9007199254740991,
      "minGapSeconds": -9007199254740991
    }
  },
  "replyToAddress": "replyToAddress",
  "transport": "SMTP"
}