Provisioning API

Retrieve a user

GET

/users/{user_id}

const url = 'https://live-api.customers.ac/v1/users/usr_a1b2c3d4-e5f6-7890-abcd-ef1234567890';
const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}

curl --request GET \
  --url https://live-api.customers.ac/v1/users/usr_a1b2c3d4-e5f6-7890-abcd-ef1234567890 \
  --header 'Authorization: Bearer <token>'

Returns a single user by ID.

Authorizations

BearerAuth
users:read

Parameters

Path Parameters

user_id

required

string format: uuid

Example

usr_a1b2c3d4-e5f6-7890-abcd-ef1234567890

The unique identifier of the user.

Responses

200

The requested user.

application/json

object

data

required

object

required

Unique identifier for the user.

string format: uuid

email

required

The user’s email address. Must be unique across your partner account.

string format: email

name

The user’s full name.

string | null

company

The user’s company or organization name.

string | null

external_id

An optional identifier from your system. Useful for correlating sending.ac users with your own customer records.

string | null

senders_count

Number of senders belonging to this user.

integer

created_at

required

When the user was created.

string format: date-time

updated_at

required

When the user was last updated.

string format: date-time

Example

{
  "data": {
    "id": "usr_a1b2c3d4-e5f6-7890-abcd-ef1234567890",
    "email": "jane@acme.com",
    "name": "Jane Doe",
    "company": "Acme Corp",
    "external_id": "cust_8hTk2mN",
    "senders_count": 2,
    "created_at": "2026-03-20T09:00:00Z",
    "updated_at": "2026-03-20T09:00:00Z"
  }
}

401

Authentication failed. The API key is missing or invalid.

application/json

object

error

required

object

code

required

A machine-readable error code.

string

Allowed values: auth.missing_key auth.invalid_key auth.insufficient_scope rate.quota_exceeded validation.required_field validation.invalid_value resource.not_found resource.already_exists resource.not_ready server.error

message

required

A human-readable explanation of the error.

string

doc_url

A link to the documentation page for this error code.

string format: uri

details

For validation errors, a list of individual field-level problems.

Array<object> | null

object

field

required

The field that caused the error, in dot notation.

string

code

A machine-readable code for this specific validation issue.

string

message

required

A human-readable explanation.

string

Examples

No API key provided

{
  "error": {
    "code": "auth.missing_key",
    "message": "No API key was provided. Include your key in the Authorization header: Bearer sac_live_xxxxx.",
    "doc_url": "https://docs.sending.ac/errors/auth-missing-key"
  }
}

Invalid API key

{
  "error": {
    "code": "auth.invalid_key",
    "message": "The API key provided is invalid or has been revoked.",
    "doc_url": "https://docs.sending.ac/errors/auth-invalid-key"
  }
}

403

The API key does not have the required scope for this operation.

application/json

object

error

required

object

code

required

A machine-readable error code.

string

message

required

A human-readable explanation of the error.

string

doc_url

A link to the documentation page for this error code.

string format: uri

details

For validation errors, a list of individual field-level problems.

Array<object> | null

object

field

required

The field that caused the error, in dot notation.

string

code

A machine-readable code for this specific validation issue.

string

message

required

A human-readable explanation.

string

Example

{
  "error": {
    "code": "auth.insufficient_scope",
    "message": "Your API key does not have the 'senders:write' scope required for this operation.",
    "doc_url": "https://docs.sending.ac/errors/auth-insufficient-scope"
  }
}

404

The requested resource does not exist.

application/json

object

error

required

object

code

required

A machine-readable error code.

string

message

required

A human-readable explanation of the error.

string

doc_url

A link to the documentation page for this error code.

string format: uri

details

For validation errors, a list of individual field-level problems.

Array<object> | null

object

field

required

The field that caused the error, in dot notation.

string

code

A machine-readable code for this specific validation issue.

string

message

required

A human-readable explanation.

string

Example

{
  "error": {
    "code": "resource.not_found",
    "message": "No sender found with ID snd_a1b2c3d4-e5f6-7890-abcd-ef1234567890.",
    "doc_url": "https://docs.sending.ac/errors/resource-not-found"
  }
}

429

You have exceeded the rate limit. Wait and retry.

application/json

object

error

required

object

code

required

A machine-readable error code.

string

message

required

A human-readable explanation of the error.

string

doc_url

A link to the documentation page for this error code.

string format: uri

details

For validation errors, a list of individual field-level problems.

Array<object> | null

object

field

required

The field that caused the error, in dot notation.

string

code

A machine-readable code for this specific validation issue.

string

message

required

A human-readable explanation.

string

Example

{
  "error": {
    "code": "rate.quota_exceeded",
    "message": "Rate limit exceeded. You may make 120 requests per minute. Retry after 30 seconds.",
    "doc_url": "https://docs.sending.ac/errors/rate-quota-exceeded"
  }
}

Headers

Retry-After

integer

Example

Number of seconds to wait before retrying.

X-RateLimit-Limit

integer

Example

The maximum number of requests allowed per minute.

X-RateLimit-Remaining

integer

Example

The number of requests remaining in the current window.

X-RateLimit-Reset

integer

Example

1711267260

Unix timestamp when the rate limit window resets.