| Anthropic |
web_search |
```json
{
"text": "Claude Shannon was born on April 30, 1916, in Petoskey, Michigan",
"type": "text",
"citations": [
{
"type": "web_search_result_location",
"url": "https://en.wikipedia.org/wiki/Claude_Shannon",
"title": "Claude Shannon - Wikipedia",
"encrypted_index": "Eo8BCioIAhgBIiQyYjQ0OWJmZi1lNm..",
"cited_text": "Claude Elwood Shannon (April 30, 1916 – February 24, 2001)..."
}
]
}
```
|
| Anthropic |
web_fetch |
```json
{
"text": "the main argument presented is that artificial intelligence will transform healthcare",
"type": "text",
"citations": [
{
"type": "char_location",
"document_index": 0,
"document_title": "Article Title",
"start_char_index": 1234,
"end_char_index": 1456,
"cited_text": "Artificial intelligence is poised to revolutionize healthcare delivery..."
}
]
}
```
|
| OpenAI |
web_search (url_citation) |
```json
{
"type": "output_text",
"text": "On March 6, 2025, several news outlets reported...",
"annotations": [
{
"type": "url_citation",
"start_index": 2606,
"end_index": 2758,
"url": "https://example.com/article",
"title": "Example Article"
}
]
}
```
|
| OpenAI |
file_citation / container_file_citation |
```json
{
"type": "output_text",
"text": "Per the uploaded report, revenue increased 12% year-over-year.",
"annotations": [
{
"type": "file_citation",
"file_id": "file-abc123",
"filename": "q3-earnings.pdf",
"index": 0
}
]
}
```
|
| Perplexity |
Sonar |
```json
{
"choices": [
{
"message": {
"role": "assistant",
"content": "Apple reported Q2 revenue of $95.4 billion [1], driven by Services growth [2]."
}
}
],
"citations": [
"https://www.apple.com/newsroom/pdfs/fy2025-q2/FY25_Q2_Consolidated_Financial_Statements.pdf"
],
"search_results": [
{
"title": "[PDF] Consolidated Financial Statements - Apple",
"url": "https://www.apple.com/newsroom/pdfs/fy2025-q2/FY25_Q2_Consolidated_Financial_Statements.pdf",
"date": "2025-05-01",
"snippet": "Net sales by reportable segment: Americas $40,315..."
}
]
}
```
|
| Perplexity |
Agent API |
```json
{
"type": "output_text",
"text": "Spain won Euro 2024, defeating England 2-1 in the final [1].",
"annotations": [
{
"type": "url_citation",
"start_index": 0,
"end_index": 52,
"url": "https://en.wikipedia.org/wiki/UEFA_Euro_2024_final",
"title": "UEFA Euro 2024 final"
}
]
}
```
|
| Amazon Bedrock |
InvokeAgent |
```json
{
"completion": "The refund policy allows returns within 30 days of purchase.",
"citations": [
{
"generatedResponsePart": {
"textResponsePart": {
"text": "returns within 30 days of purchase",
"span": { "start": 32, "end": 66 }
}
},
"retrievedReferences": [
{
"content": {
"type": "TEXT",
"text": "Customers may return items within 30 days..."
},
"location": {
"s3Location": { "uri": "s3://my-bucket/policies/refund.pdf" }
}
}
]
}
]
}
```
|
| Amazon Bedrock |
RetrieveAndGenerate / Knowledge Bases |
```json
{
"output": {
"text": "The refund policy allows returns within 30 days of purchase."
},
"citations": [
{
"generatedResponsePart": {
"textResponsePart": {
"text": "returns within 30 days of purchase",
"span": { "start": 32, "end": 66 }
}
},
"retrievedReferences": [
{
"content": {
"type": "TEXT",
"text": "Customers may return items within 30 days..."
},
"location": {
"s3Location": { "uri": "s3://my-bucket/policies/refund.pdf" }
},
"metadata": { "x-amz-bedrock-kb-chunk-id": "abc123" }
}
]
}
]
}
```
|
| Azure |
Responses API + Bing (url_citation) |
```json
{
"type": "output_text",
"text": "If you're searching for uplifting news from November 2025...",
"annotations": [
{
"type": "url_citation",
"start_index": 333,
"end_index": 564,
"url": "https://example.com/article",
"title": "Example Article"
}
]
}
```
|
| Azure |
On Your Data (Azure AI Search) |
```json
{
"role": "assistant",
"content": "Contoso's Q3 revenue grew 12% year-over-year [doc1].",
"context": {
"citations": [
{
"content": "Q3 revenue was $4.2B, up 12% YoY...",
"title": "Q3 Earnings Summary",
"filepath": "reports/q3-2025.pdf",
"url": "https://contoso.sharepoint.com/...",
"chunk_id": "chunk-42"
}
]
}
}
```
|