data912-market-data（data912 市场数据）

Data912 Market Data

Query Data912's public market API for Argentina and USA market data snapshots, historical bars, and EOD derivatives analytics.

API Overview

• Base URL: https://data912.com
• Auth: None required (public API)
• Format: JSON responses
• Source note: Data912 describes this API as educational/hobby data and explicitly not real-time.
• Caching note: Server metadata indicates roughly 2-hour Cloudflare caching.

Endpoint Groups

1. Live Market Panels

• /live/mep (USD MEP)
• /live/ccl (USD CCL)
• /live/arg_stocks
• /live/arg_options
• /live/arg_cedears
• /live/arg_notes
• /live/arg_corp
• /live/arg_bonds
• /live/usa_adrs
• /live/usa_stocks

Example:

curl -s "https://data912.com/live/arg_stocks" | jq '.[0:5]'

2. Historical OHLC

• /historical/stocks/{ticker}
• /historical/cedears/{ticker}
• /historical/bonds/{ticker}

Example:

curl -s "https://data912.com/historical/stocks/GGAL" | jq '.[0:10]'

3. EOD Derivatives Analytics

• /eod/volatilities/{ticker}
• /eod/option_chain/{ticker}

Examples:

curl -s "https://data912.com/eod/volatilities/AAPL" | jq '.'
curl -s "https://data912.com/eod/option_chain/AAPL" | jq '.[0:10]'

Out of Scope for This Skill

• Do not use /contact in this skill. Keep this skill focused on market data retrieval and interpretation.

Key Fields

Panel Fields (/live/*)

• symbol: instrument ticker/symbol
• px_bid, q_bid: bid price and bid size
• px_ask, q_ask: ask price and ask size
• c: last/close-like traded value
• pct_change: percentage variation
• v: volume
• q_op: operations count (when provided)

Historical Fields (/historical/*/{ticker})

• date: date string
• o, h, l, c: OHLC values
• v: volume
• dr: daily return
• sa: additional numeric metric provided by source

Volatility Metrics (/eod/volatilities/{ticker})

• IV term structure: iv_s_term, iv_m_term, iv_l_term
• IV percentiles: iv_*_percentile
• HV term structure: hv_s_term, hv_m_term, hv_l_term
• HV percentiles: hv_*_percentile
• Relative-value ratios: iv_hv_*_ratio, iv_fair_iv_ratio
• Fair value reference: fair_iv, fair_iv_percentile

Option Chain Fields (/eod/option_chain/{ticker})

• Contract context: opex, s_symbol, type, k
• Market data: bid, ask, c, oi
• Greeks: delta, gamma, theta, vega, rho
• Valuation/probabilities: fair_value, fair_iv, itm_prob, intrinsic, otm
• Horizon context: r_days, r_tdays, hv_2m, hv_1yr

Workflow

1. Identify intent and select endpoint group:

- FX/panel snapshot -> /live/* - Time series/evolution -> /historical/*/{ticker} - Options/risk analytics -> /eod/*/{ticker}

1. Validate required input:

- For historical/EOD endpoints, require a ticker symbol. - If ticker is missing, ask for it before querying.

1. Fetch data with curl -s and parse with jq.
2. Handle empty arrays:

- If response is [], report: "No data currently available for this endpoint/ticker."

1. Present an actionable summary:

- Start with a short snapshot. - Then include relevant detail fields requested by the user.

1. Keep context clear:

- Remind users this is educational/non-real-time data. - Avoid turning output into trading advice.

Error Handling

• 429 Too Many Requests:

- Most market endpoints publish 120 req/min. - Back off and retry after a short delay; avoid burst loops.

• 422 Validation Error:

- Usually invalid/missing path input such as ticker formatting. - Re-check symbol and endpoint before retrying.

• Network/timeout failures:

- Retry a small number of times (for example, 2 retries with delay). - If still failing, return a clear failure message and the endpoint attempted.

Presenting Results

When returning results to the user:

• Lead with a concise snapshot (what moved, where, and magnitude).
• For panel requests, compare bid/ask/last and % change.
• For historical requests, summarize trend windows and notable jumps.
• For vol/options requests, highlight percentiles and IV/HV relationships.
• Explicitly mention the data is educational/non-real-time.
• Do not provide financial recommendations.

OpenAPI Spec

For the full schema and endpoint definitions, see references/openapi-spec.json.