|
| 1 | +--- |
| 2 | +title: Span Protocol |
| 3 | +--- |
| 4 | + |
| 5 | +<Alert level="info"> |
| 6 | + This document uses key words such as "MUST", "SHOULD", and "MAY" as defined in [RFC 2119](https://www.ietf.org/rfc/rfc2119.txt) to indicate requirement levels. |
| 7 | +</Alert> |
| 8 | + |
| 9 | +The SDK must implement a new "span v2" envelope item, which is used to emit spans to Sentry. |
| 10 | + |
| 11 | +## Span v2 Envelope Item Header |
| 12 | + |
| 13 | +The envelope item header must contain the following properties: |
| 14 | + |
| 15 | +```json |
| 16 | +{ |
| 17 | + "type": "span", |
| 18 | + "item_count": 2, |
| 19 | + "content_type": "application/vnd.sentry.items.span.v2+json" |
| 20 | +} |
| 21 | +``` |
| 22 | + |
| 23 | +## Span v2 Envelope Item Payload |
| 24 | + |
| 25 | +The envelope item payload must contain an `items` array with span one and up to 1000 span objects: |
| 26 | + |
| 27 | +```json |
| 28 | +{ |
| 29 | + "items": [ |
| 30 | + { |
| 31 | + "trace_id": "6cf173d587eb48568a9b2e12dcfbea52", |
| 32 | + "parent_span_id": null, |
| 33 | + "span_id": "438f40bd3b4a41ee", |
| 34 | + "name": "GET /users", |
| 35 | + "status": "ok", |
| 36 | + "is_remote": true, |
| 37 | + "kind": "server", |
| 38 | + "start_timestamp": 1742921669.158209, |
| 39 | + "end_timestamp": 1742921669.180536, |
| 40 | + "attributes": { |
| 41 | + "sentry.release": { |
| 42 | + "type": "string", |
| 43 | + "value": "1.0.0" |
| 44 | + }, |
| 45 | + "sentry.environment": { |
| 46 | + "type": "string", |
| 47 | + "value": "local" |
| 48 | + }, |
| 49 | + "sentry.platform": { |
| 50 | + "type": "string", |
| 51 | + "value": "php" |
| 52 | + }, |
| 53 | + "sentry.sdk.name": { |
| 54 | + "type": "string", |
| 55 | + "value": "sentry.php" |
| 56 | + }, |
| 57 | + "sentry.sdk.version": { |
| 58 | + "type": "string", |
| 59 | + "value": "4.10.0" |
| 60 | + }, |
| 61 | + "sentry.transaction_info.source": { |
| 62 | + "type": "string", |
| 63 | + "value": "route" |
| 64 | + }, |
| 65 | + "sentry.origin": { |
| 66 | + "type": "string", |
| 67 | + "value": "auto" |
| 68 | + }, |
| 69 | + "server.address": { |
| 70 | + "type": "string", |
| 71 | + "value": "127.0.0.1" |
| 72 | + }, |
| 73 | + "http.response.status_code": { |
| 74 | + "type": "integer", |
| 75 | + "value": 200 |
| 76 | + }, |
| 77 | + "links": [ |
| 78 | + { |
| 79 | + "span_id": "6c71fc6b09b8b716", |
| 80 | + "trace_id": "627a2885119dcc8184fae7eef09438cb", |
| 81 | + "sampled": true, |
| 82 | + "attributes": { |
| 83 | + "sentry.link.type": { |
| 84 | + "type": "string", |
| 85 | + "value": "previous_trace" |
| 86 | + } |
| 87 | + } |
| 88 | + } |
| 89 | + ] |
| 90 | + }, |
| 91 | + }, |
| 92 | + { |
| 93 | + "trace_id": "6cf173d587eb48568a9b2e12dcfbea52", |
| 94 | + "parent_span_id": "438f40bd3b4a41ee", |
| 95 | + "span_id": "f1196292f76e45c0", |
| 96 | + "name": "app.handle", |
| 97 | + "status": "ok", |
| 98 | + "is_remote": false, |
| 99 | + "kind": "server", |
| 100 | + "start_timestamp": 1742921669.178306, |
| 101 | + "end_timestamp": 1742921669.180484, |
| 102 | + "attributes": { |
| 103 | + "sentry.origin": { |
| 104 | + "type": "string", |
| 105 | + "value": "auto" |
| 106 | + } |
| 107 | + } |
| 108 | + } |
| 109 | + ] |
| 110 | +} |
| 111 | +``` |
| 112 | + |
| 113 | +## Span v2 Protocol Properties |
| 114 | + |
| 115 | +### Envelope Item Header Properties |
| 116 | + |
| 117 | +| Property | Type | Required | Description | |
| 118 | +|----------|------|----------|-------------| |
| 119 | +| `type` | string | Yes | Must be set to `"span"` to identify this as a span envelope item | |
| 120 | +| `item_count` | integer | Yes | Number of span items in the payload | |
| 121 | +| `content_type` | string | Yes | Must be set to `"application/vnd.sentry.items.span.v2+json"` | |
| 122 | + |
| 123 | +### Span Properties |
| 124 | + |
| 125 | +| Property | Type | Required | Description | |
| 126 | +|----------|------|----------|-------------| |
| 127 | +| `trace_id` | string | Yes | 32-character hexadecimal string (a valid uuid4 without dashes) | |
| 128 | +| `span_id` | string | Yes | 16-character hexadecimal string (a valid uuid4 without dashes) | |
| 129 | +| `parent_span_id` | string | No | 16-character hexadecimal string (a valid uuid4 without dashes) | |
| 130 | +| `name` | string | Yes | A low cardinality description of what the span represents (e.g., "GET /users", "database.query") | |
| 131 | +| `status` | string | Yes | Status of the span operation. Either `"ok"` or `"error"` | |
| 132 | +| `is_remote` | boolean | Yes | Whether the SpanContext creating the span was received from somewhere else or locally generated | |
| 133 | +| `kind` | string | Yes | The kind of span. Values: `"server"`, `"client"`, `"producer"`, `"consumer"`, `"internal"` | |
| 134 | +| `start_timestamp` | number | Yes | Unix timestamp (with fractional microseconds) when the span was started | |
| 135 | +| `end_timestamp` | number | Yes | Unix timestamp (with fractional microseconds) when the span was ended | |
| 136 | +| `attributes` | object | No | Key-value pairs containing additional metadata about the span | |
| 137 | +| `links` | array | No | Array of links connecting this span to other spans or traces | |
| 138 | + |
| 139 | +### Attribute Object Properties |
| 140 | + |
| 141 | +Attributes are stored as key-value pairs where each value is an object with type information: |
| 142 | + |
| 143 | +| Property | Type | Required | Description | |
| 144 | +|----------|------|----------|-------------| |
| 145 | +| `type` | string | Yes | The data type of the attribute value. Values: `"string"`, `"integer"`, `"float"`, `"boolean"` | |
| 146 | +| `value` | any | Yes | The actual attribute value, must match the specified type | |
| 147 | +| `unit` | string | No | The unit of the attribute value. Example values: `"ms"`, `"s"`, `"bytes"`, `"count"`, `"percent"` | |
| 148 | + |
| 149 | +#### Common Attribute Keys |
| 150 | + |
| 151 | +| Attribute Key | Type | Description | |
| 152 | +|---------------|------|-------------| |
| 153 | +| `sentry.release` | string | The release version of the application | |
| 154 | +| `sentry.environment` | string | The environment name (e.g., "production", "staging", "development") | |
| 155 | +| `sentry.platform` | string | The platform/language (e.g., "php", "javascript", "python") | |
| 156 | +| `sentry.sdk.name` | string | Name of the Sentry SDK (e.g., "sentry.php", "sentry.javascript") | |
| 157 | +| `sentry.sdk.version` | string | Version of the Sentry SDK | |
| 158 | + |
| 159 | +See [Sentry Conventions](https://github.com/getsentry/sentry-conventions/) for a full list of supported attributes. |
| 160 | + |
| 161 | +### Link Object Properties |
| 162 | + |
| 163 | +Links connect spans to other spans or traces, enabling distributed tracing: |
| 164 | + |
| 165 | +| Property | Type | Required | Description | |
| 166 | +|----------|------|----------|-------------| |
| 167 | +| `span_id` | string | Yes | 16-character hexadecimal string (a valid uuid4 without dashes) | |
| 168 | +| `trace_id` | string | Yes | 32-character hexadecimal string (a valid uuid4 without dashes) | |
| 169 | +| `sampled` | boolean | No | Whether the linked trace was sampled | |
| 170 | +| `attributes` | object | No | Additional metadata about the link relationship | |
| 171 | + |
| 172 | +#### Link Attribute Keys |
| 173 | + |
| 174 | +| Attribute Key | Type | Description | |
| 175 | +|---------------|------|-------------| |
| 176 | +| `sentry.link.type` | string | Type of link relationship (e.g., "previous_trace", "child_of", "follows_from") | |
| 177 | + |
| 178 | +## Data Types and Formats |
| 179 | + |
| 180 | +### Timestamp Format |
| 181 | +Timestamps use Unix time with fractional microseconds as a floating-point number: |
| 182 | +``` |
| 183 | +1742921669.158209 |
| 184 | +``` |
| 185 | + |
| 186 | +### ID Formats |
| 187 | +- **Trace ID**: 32-character (128 bits) lowercase hexadecimal string (a valid uuid4 without dashes) |
| 188 | +- **Span ID**: 16-character (64 bits) lowercase hexadecimal string (a valid uuid4 without dashes) |
| 189 | + |
| 190 | +Example: |
| 191 | +``` |
| 192 | +trace_id: "6cf173d587eb48568a9b2e12dcfbea52" |
| 193 | +span_id: "438f40bd3b4a41ee" |
| 194 | +``` |
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