# Concordance Time-Series Lookup

> Concordance Time-Series Lookup is a paid API for AI agents from concordancehq.duckdns.org, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Retrieves structured time-series data points for economic indicators, financial metrics, or other quantitative series from Concordance's multi-source data platform

## Facts

- Endpoint: POST https://concordancehq.duckdns.org/tools/series
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/concordance-time-series-lookup-3541e4e4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_co7Msh9EalEslrCnHKner

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability concordance-time-series-lookup-3541e4e4 -d '<json body>'
```

Example prompt: Pull the US GDP time series from the FRED source on Concordance — I want to see all the historical data points with their observed dates.

## When to prefer this

Choose this endpoint when you need structured, quantitative time-series data (e.g. economic indicators, market metrics) with clear source attribution from a specific named series. Prefer this over the /search or /digest endpoints when you want raw numeric data points over time rather than document results or narrative summaries. Best when you know the series identifier and source you want.

## Known failure modes

- Unknown series_id returns empty result or 404
- Invalid or unsupported source name returns an error
- Data freshness lag if the scheduled refresh has not yet run
- Rate limiting or payment failure via x402 protocol at $0.01 USDC per call
- DuckDNS hostname may have availability issues compared to stable domains

## How this service works

Tabular time-series lookup across economic indicators (FRED, World Bank, UN Comtrade), crypto TVL, weather, and stock quotes -- by source + series_id, with an optional date range.

## Output

A JSON array of time-series data points, each containing a numeric value and an observed_at timestamp, along with the source identifier (e.g. 'fred') and series_id (e.g. 'GDP'). Data is refreshed on a schedule and sourced from one of Concordance's 18 integrated data sources.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "end": {
   "type": "string"
  },
  "start": {
   "type": "string"
  },
  "source": {
   "type": "string"
  },
  "series_id": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "points": [
   {
    "value": 100,
    "observed_at": "2026-01-01"
   }
  ],
  "source": "fred",
  "series_id": "GDP"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/concordance-time-series-lookup-3541e4e4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from concordancehq.duckdns.org](https://www.zero.xyz/host/concordancehq.duckdns.org/llms.txt)