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Concordance Digest
x402
Concordance Digest is a paid API for AI agents from concordancehq.duckdns.org, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-13).
Returns a cross-category digest of where a topic appears across 18 independent data sources (news, SEC filings, court opinions, academic papers, economic indicators, stock quotes, trade data, government records), grouped by category with source citations.
Price / call$0.03
Success—
StatusUnknown
How this service works
One call, every category: pulls everything matching a topic across all aggregated sources and groups it by category (news, legal, academic, dev community, ...) with counts -- replaces manually calling /tools/search once per category and merging results yourself. Structured aggregation, not an AI-generated summary.
Output
A JSON object with a topic field, an array of category objects each containing the category name, result count, and top results with URL, title, source identifier, content snippet, and publication date. Results are pre-grouped by source category (e.g. legal, filings, news) so the agent can see the distribution of coverage across domains at a glance.
Example use cases
Multi-source regulatory landscape scan
“Give me a digest of everything Concordance has on 'stablecoin regulation' — I want it broken out by category so I can see whether it's hitting SEC filings, court opinions, news, and government records separately.”
Due diligence topic sweep
“I'm doing background research on Enovis Corporation — pull a cross-category digest of all topic mentions grouped by source type, including legal, filings, and news.”
Policy research across government and academic sources
“I need a topic digest on 'carbon border adjustment mechanism' — show me where it appears across academic papers, economic indicators, trade data, and government records, with counts per category.”
Technical details
Endpoint
POSThttps://concordancehq.duckdns.org/tools/digestWhen to prefer
Choose this endpoint when you need to understand the breadth of coverage for a topic across heterogeneous source types simultaneously — rather than searching a single domain. Ideal for due diligence, policy research, or journalism where you need to know whether a topic is appearing in legal, financial, academic, and regulatory channels at once. Prefer over the /search endpoint when you want category-grouped aggregation rather than a flat ranked result list. Prefer over /company_brief when your subject is a topic or concept rather than a specific named company.
Side effects
- Topic not found in any category returns empty categories array with zero counts
- Malformed or missing topic parameter returns HTTP 400 error
- Payment not attached or insufficient USDC (requires $0.03) returns HTTP 402
- Data freshness lag: sources are refreshed on a schedule, not live-proxied, so very recent events may not appear
- Rate limiting or service unavailability returns HTTP 429 or 503
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| since | string | |
| topic | string | |
| per_category_limit | integer |
Output
Schema · Response
{
"type": "json",
"example": {
"topic": "cryptocurrency regulation",
"categories": [
{
"count": 2,
"category": "legal",
"top_results": [
{
"url": "https://www.regulations.gov/document/EPA-HQ-OAR-2022-0985-3228",
"title": "Tracking electricity consumption from U.S. cryptocurrency mining",
"source": "regulations_gov",
"content": "IN-DEPTH ANALYSIS cryptocurrency mining",
"published_at": "2024-04-22T04:00:00Z"
}
]
}
],
"total_count": 4
}
}Tags
x402
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