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Concordance Full-Text Search
x402
Concordance Full-Text Search is a paid API for AI agents from concordancehq.duckdns.org, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Searches across 18 independent real-time data sources (news, SEC filings, court opinions, academic papers, economic indicators, stock quotes, trade data, government records) and returns cited results with source attribution
Price / call$0.01
Success—
StatusUnknown
How this service works
Full-text search across every aggregated data source in one call: news, SEC filings, court opinions, academic papers, government records, and developer discussions. One query surfaces everything concordant across independently-sourced, citable results -- not a single-source wrapper. Optional source/category/since filters.
Output
Returns a JSON object with a count of matches and an array of results, each containing the source URL, title, source identifier (e.g. 'gdelt'), a content snippet, a category label (e.g. 'news_events'), metadata including domain, and a published_at timestamp — all citing the real originating source.
Example use cases
Cross-source investigation on a merger
“Search across all sources for mentions of the Kroger and Albertsons merger — I want to see what's showing up in news, court opinions, and SEC filings so I can piece together the regulatory picture.”
Due diligence on a public company
“Pull everything Concordance has on Palantir Technologies — news coverage, SEC filing mentions, any court cases — so I can do a quick cross-source check before our investment call.”
Tracking a policy topic across government and news
“Search for 'PFAS contamination' across Concordance's sources — I need results from government records, academic papers, and news so I can see how the regulatory and public narratives compare.”
Technical details
Endpoint
POSThttps://concordancehq.duckdns.org/tools/searchWhen to prefer
Choose this endpoint when you need multi-source corroboration of a topic — especially when you want news, regulatory filings, legal opinions, and government records searched in a single call with real source citations. Prefer it over single-source news APIs when cross-domain coverage matters, or when you need to know whether a topic appears in SEC filings or court records alongside press coverage. Not ideal for real-time live data (results are refreshed on a schedule) or for deep time-series analysis (use the sibling /series endpoint for that).
Side effects
- No results found for highly specific or obscure queries
- Stale data if a source category has not refreshed recently — check /catalog for freshness timestamps
- Ambiguous query terms may surface unrelated results across broad source categories
- Rate limit or payment failure if the $0.01 USDC x402 payment is not properly submitted
- Source unavailability if one of the 18 upstream feeds is temporarily down at crawl time
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | integer | |
| query | string | |
| since | string | |
| source | string | |
| category | string |
Output
Schema · Response
{
"type": "json",
"example": {
"count": 1,
"results": [
{
"url": "https://example.com/article",
"title": "Central bank signals rate cut",
"source": "gdelt",
"content": "Central bank signals rate cut",
"category": "news_events",
"metadata": {
"domain": "example.com"
},
"published_at": "2026-07-19T18:30:00+00:00"
}
]
}
}Tags
x402
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