Issue a free canlicapital.com validation key (POST /api/v1/keys) and hold it in memory for this session. Only needed before a validation when neither CANLI_KEY nor local mode is set; the read tools (get_receipt, service_status, company_financial_history) never need a key. Quotas: 1000 validations per key per UTC day, 5 keys per client per UTC day, 1048576 bytes per validation request, 1024 bytes per key revocation request, 20000 observations per series, 200 variants per matrix.

Whether a Sharpe survives the number of variants tried: probabilistic and deflated Sharpe (0 to 1) and the Sharpe luck alone would reach. Send the seven statistics or a return series, not both. A deflated Sharpe or overfitting probability above or below any threshold is not admission to anything and is not a forecast.

Probability (0 to 1) that picking the best of several backtested variants was overfitting, by CSCV over every variant's returns. A deflated Sharpe or overfitting probability above or below any threshold is not admission to anything and is not a forecast.

Whether a paper or simulated performance record meets canli.paper-evidence.v0, with each failure's JSON pointer. This verdict is about the series exactly as submitted. The service never saw the data source, its costs, survivorship, or any lookahead in how the series was built.

Highest book Sharpe reachable by adding sleeves of this quality and correlation, the Sharpe at a sleeve count, and the sleeves a target needs. This verdict is about the series exactly as submitted. The service never saw the data source, its costs, survivorship, or any lookahead in how the series was built.

Minimum track record length, in observations and years, for an observed Sharpe to beat a benchmark at a confidence level, and with observations, the record's probabilistic Sharpe so far. A deflated Sharpe or overfitting probability above or below any threshold is not admission to anything and is not a forecast.

Minimum backtest length, in years, before the best of N independent trials is not expected to reach a target Sharpe by luck, and with backtest_years, the most independent trials those years allow. Send effective_independent_trials, backtest_years, or both. A deflated Sharpe or overfitting probability above or below any threshold is not admission to anything and is not a forecast.

Haircut Sharpe ratio for multiple testing (Harvey and Liu, 2015): the Sharpe a single test would have needed once the number of tests is counted, by Bonferroni and for independent tests, and with the other tests' Sharpe ratios by Holm and BHY. A deflated Sharpe or overfitting probability above or below any threshold is not admission to anything and is not a forecast.

How many skill-less strategies a search would have had to try for its best to reach this Sharpe by luck, and, with a trial count, the chance that it did. Calibrated by Monte Carlo. A deflated Sharpe or overfitting probability above or below any threshold is not admission to anything and is not a forecast.

Audit one strategy's return series in one call: deflated Sharpe, the minimum track record length for its Sharpe to beat the benchmark, and, with every variant's returns, the probability of backtest overfitting. Point returns_file at the backtest's CSV or JSON rather than copying long series into the call. Each check is the matching validate_ tool's result with its own receipt, side by side; the audit does not grade the strategy. Uses one validation per check. A deflated Sharpe or overfitting probability above or below any threshold is not admission to anything and is not a forecast.

Fetch a stored verdict by receipt id (GET /api/v1/receipts/{id}) to re-check an earlier result. No key. The receipt is content-hashed, reproducible from the open-source core it names, and signed with Ed25519 by a key published at https://canlicapital.com/.well-known/canli-receipt-keys.json.

Check a validation receipt's Ed25519 signature offline against the canlicapital.com public key bundled in this package, that its output hashes to its output_sha256, and that its content hashes to its id. Send an id to fetch the receipt first, or a receipt already fetched. The receipt is content-hashed, reproducible from the open-source core it names, and signed with Ed25519 by a key published at https://canlicapital.com/.well-known/canli-receipt-keys.json.

Whether the validation API is up, with quota constants (GET /api/v1/validate/status); check after a timeout before resubmitting. No key. This verdict is about the series exactly as submitted. The service never saw the data source, its costs, survivorship, or any lookahead in how the series was built.

SEC-reported financial history for one company from the canlicapital.com company reference (GET /company-data/{cik}.json), by cik or by ticker (resolved through GET /api/v1/company-tickers.json, companies in the release only). Without a concept it lists the available histories; with one it returns observations, newest first, each with its filing accession, form, filed date and unit, plus the SHA-256 of the original SEC response. No key required. Public company accounting reference, not market prices, returns, an investment recommendation, or ALPHAC performance. Validate a separately constructed return series with the validation API; accounting values are not returns.