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Bookrail

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Retrieve an event

GET
/v1/events/{id}

Not behind the horizon: the caller already holds the identifier.

Authorizations

Section titled “Authorizations ”

Parameters

Section titled “ Parameters ”

Path Parameters

Section titled “Path Parameters ”
id
required

Identifier of the event.

string

Header Parameters

Section titled “Header Parameters ”
Bookrail-Version

The dated API version to speak. Defaults to 2026-09-01; an unsupported value is a 400.

string
Example
2026-09-01
Bookrail-Actor

Which Bookrail tool the caller is, recorded as actor.via on every event the request writes. A closed list: an unknown value is a 400. Absent means the request declared no tool.

string
Allowed values: mcp cli sdk dashboard

Responses

Section titled “ Responses ”

200

Section titled “200 ”

Success.

object
id
required

Identifier of a event, prefixed with evt_.

string
/^evt_[0-9a-f]{32}$/
Example
evt_0198f0c2a1b47e2e9a1c0f4d5e6a7b8c
object
required
string
Allowed values: event
type
required
string
occurred_at
required

ISO 8601 instant in UTC.

string | null format: date-time
Example
2026-09-08T07:00:00Z
api_version
required
string
seq
required

Position in the global event sequence. Not a count: a project’s values have arbitrary gaps.

integer
actor
required

{type: "api", id: "key_...", via?: "mcp"|"cli"|"sdk"|"dashboard"} for an HTTP write, {type: "system", id: null} for an automatic transition, null when nobody declared one.

object | null
data
required
object
object
required

Snapshot of the object after the change.

object | null
previous
required

The fields that changed, or null for a creation.

object | null
environment
required

The environment of the API key that created the object.

string
Allowed values: test live
created_at
required

ISO 8601 instant in UTC.

string | null format: date-time
Example
2026-09-08T07:00:00Z

Headers

Section titled “Headers ”
Bookrail-Request-Id
required

Identifier of this request. Quote it to support.

string
Bookrail-Version
required

The API version this response was produced with.

string

400

Section titled “400 ”

Error codes: parameter_invalid, unsupported_api_version.

object
error
required
object
type
required
string
Allowed values: invalid_request authentication permission not_found conflict rate_limit policy_violation payment_required internal
code
required

Machine readable code. The set is per operation; each response below lists the ones it can produce.

string
message
required
string
param

The field or header the error is about, when there is one.

string
doc_url
required
string
request_id
required
string

Headers

Section titled “Headers ”
Bookrail-Request-Id
required

Identifier of this request. Quote it to support.

string
Bookrail-Version
required

The API version this response was produced with.

string

401

Section titled “401 ”

Error codes: invalid_api_key, invalid_authorization_header, missing_api_key, revoked_api_key.

object
error
required
object
type
required
string
Allowed values: invalid_request authentication permission not_found conflict rate_limit policy_violation payment_required internal
code
required

Machine readable code. The set is per operation; each response below lists the ones it can produce.

string
message
required
string
param

The field or header the error is about, when there is one.

string
doc_url
required
string
request_id
required
string

Headers

Section titled “Headers ”
Bookrail-Request-Id
required

Identifier of this request. Quote it to support.

string
Bookrail-Version
required

The API version this response was produced with.

string

404

Section titled “404 ”

Error codes: resource_missing.

object
error
required
object
type
required
string
Allowed values: invalid_request authentication permission not_found conflict rate_limit policy_violation payment_required internal
code
required

Machine readable code. The set is per operation; each response below lists the ones it can produce.

string
message
required
string
param

The field or header the error is about, when there is one.

string
doc_url
required
string
request_id
required
string

Headers

Section titled “Headers ”
Bookrail-Request-Id
required

Identifier of this request. Quote it to support.

string
Bookrail-Version
required

The API version this response was produced with.

string

500

Section titled “500 ”

Error codes: internal_error.

object
error
required
object
type
required
string
Allowed values: invalid_request authentication permission not_found conflict rate_limit policy_violation payment_required internal
code
required

Machine readable code. The set is per operation; each response below lists the ones it can produce.

string
message
required
string
param

The field or header the error is about, when there is one.

string
doc_url
required
string
request_id
required
string

Headers

Section titled “Headers ”
Bookrail-Request-Id
required

Identifier of this request. Quote it to support.

string
Bookrail-Version
required

The API version this response was produced with.

string