hodlodds — Python client

Pay-per-answer crash odds for Solana memecoins, paid per request with x402 (USDC on Solana or Base). No accounts, no API keys.

The API at https://api.hodlodds.com accepts payments. Check its free status, markets and coverage endpoints before paying. Local test servers can use Solana devnet or Base Sepolia.

What it answers

What are the odds that this token's price falls 90% or more within the next 60 minutes?

0.04 is an estimated 4% chance of the defined event within the forecast window. Confidence describes historical calibration in that probability range, not a guarantee for this token. Higher means riskier, but a low number is not a safety signal: smaller or slower drops are not counted, and odds change minute by minute.

A crash is a completed one-minute close, priced in SOL, at least 90% below the reference price within the next 60 minutes. Coverage: SOL-quoted pump.fun graduates. Every answer carries a confidence level (high / medium / low) based on how well past predictions in that probability range matched reality.

dd_60 is the latest close divided by the maximum close in the previous 60 minutes, minus one. Zero means the token is at that hour's high; dd_60 <= -0.90 means it has already fallen at least 90% within the hour. Rows expose already_crashed (true, false, or null when the drawdown is unknown). A true value also carries a note and a warning in summary: a low crash probability after a collapse is not a recovery or safety signal. Below about 2%, observed crash rates have run up to about twice the predicted value, under one percentage point in absolute terms; those answers carry confidence: low.

The normal risk and board routes charge only for fresh, covered answers. The opt-in /last route can charge for clearly labelled last-known odds within its 30-minute limit. Uncovered and ineligible answers are free. A refusal carrying HodlOdds-Charged: no is treated as free unless a successful payment receipt contradicts it; this includes an oversized-header 431. If eligibility changes after signing, that free refusal creates no pending payment.

Freshness

Scores are recomputed every 60 seconds, about 20 seconds after each minute closes, from completed one-minute bars up to as_of. Each score covers the 60 minutes after its as_of time and is valid only until the next update; the odds for the same token can rise sharply from one minute to the next. Scoring starts around :20; computation and publication can delay availability. For decisions, refresh immediately before acting and once per minute for continuous monitoring, checking as_of for a new minute. The API freshness cutoff is separate: by default, data becomes stale more than 120 seconds after issued_at or after expires_at. A new request does not restart the forecast window.

The opt-in /v1/risk/{mint}/last route returns stored odds at most 30 minutes after issuance, including exactly 1800 seconds. It also works while live. When stale, confidence drops high to medium or medium to low; low stays low and missing confidence stays missing. Its original horizon and expiry stay unchanged.

Install

pip install hodlodds                                        # from PyPI
pip install "git+https://github.com/hodlodds/hodlodds-sdk"  # or the latest main

Python 3.10+. Dependencies: httpx and the official x402[svm,evm]==2.25.0 SDK (pinned).

MCP server

The separate hodlodds-mcp package provides local stdio tools for market discovery and crash odds, with per-call and session payment limits.

pip install hodlodds-mcp See the MCP README for client configuration and payment safety.

Use

Command line:

hodlodds status
hodlodds markets
hodlodds coverage <MINT> --chain solana --platform pumpfun
hodlodds risk <MINT> --keypair ~/.config/hodlodds/wallet.json --pay-to <RECIPIENT> --network solana
hodlodds risk <MINT> --keypair ~/.config/hodlodds/base-wallet.json --pay-to <BASE_RECIPIENT> --network base
hodlodds board --limit 100 --sort lowest_risk --max-risk 0.05 --min-liquidity 50 --max-price 0.5 \
  --keypair ... --pay-to ... --network solana
hodlodds last <MINT> --keypair ... --pay-to ... --network solana

Python:

from hodlodds import HodlOdds, HodlOddsError

with HodlOdds("https://api.hodlodds.com", keypair="~/.config/hodlodds/wallet.json",
              network="solana", pay_to="<RECIPIENT>", max_price_usdc="0.01") as client:
    print(client.status()["state"])
    print(client.markets())
    print(client.coverage("<MINT>", chain="solana", platform="pumpfun"))
    try:
        answer = client.risk("<MINT>")
        row = answer.data["row"]
        print(row["p_crash_60m"], row["confidence"]["level"], answer.payment["explorer"])
    except HodlOddsError as e:
        print(e, e.status, e.body)
        # e.payment["charged"] == False means a confirmed free refusal.
        # A PendingPayment needs reconciliation or explicit redemption.

<RECIPIENT> is the payment address for your chosen payment network, published in GET /v1/meta. Verify and pin it in your code: the client refuses any offer that pays someone else.

Networks: devnet and solana (mainnet; mainnet is an alias) take a Solana JSON key file; base-sepolia and base take an EVM key file ({"private_key": "0x..."}, mode 0600). Prices are the same on both chains, and the API offers both; the client signs only on the network you chose.

base = HodlOdds("https://api.hodlodds.com", keypair="~/.config/hodlodds/base-wallet.json",
                network="base", pay_to="<BASE_RECIPIENT>", max_price_usdc="0.01")

Board options: limit 10–500 (default 50); sort = lowest_risk (default), riskiest, liquidity, newest, active; filters max_risk, min_risk, min_liquidity_sol, min_age_min, max_age_min, min_trades_5, min_confidence (high/medium/low) and include_crashed (True/False). The total price is 0.005 × coins returned; pass max_price_usdc in Python or --max-price on the CLI at least that high. The default per-call maximum is 0.01 USDC, so boards normally need an explicit higher limit. The hard cap is 2.5 USDC for board calls only and 1 USDC for individual risk/last calls. min_trades_5 accepts integers from 0 through 9223372036854775807.

Compatibility: the 0.2.0 safest sort remains accepted as an alias for lowest_risk, and the mainnet payment-network alias still means solana. These older spellings are deprecated in examples; existing calls keep working.

For lowest_risk and its safest alias, the server applies min_trades_5=3 and include_crashed=false when those filters are omitted, so barely traded or already-collapsed tokens do not dominate the list. Explicit values override the defaults, including min_trades_5=0 and include_crashed=True (CLI: --min-trades 0 --include-crashed). Other sorts keep their existing selection. An explicit mints= watchlist gets neither default: crashed holdings remain visible and flagged unless you explicitly request include_crashed=False.

Board answers return effective filters and defaults_applied, which is empty when no default was added. The offer binds exactly the client's own normalized parameters. The server applies its documented defaults deterministically when selecting and pricing rows; the client does not add those defaults to the signed query.

board = client.board(limit=100, sort="lowest_risk", max_risk=0.05, min_liquidity_sol=50, max_price_usdc="0.5")
for row in board.data["rows"]:
    print(row["mint"], row["p_crash_60m"], row["confidence"]["level"])
# Explicitly include quiet and already-collapsed tokens:
all_rows = client.board(min_trades_5=0, include_crashed=True, max_price_usdc="0.25")
# The cheaper, opt-in answer preserves its original horizon and labels its age:
last_known = client.last("<MINT>")
print(last_known.data["age_s"], last_known.data["freshness"])

last() costs 0.002 USDC and can return last-known odds up to 30 minutes old, including while the feed is live. Check stale, age_s, freshness and horizon_remaining_s; buying the answer does not renew its forecast.

When a board offer changes

A board 409 with code: "offer_changed" means the matching set changed between the offer and the paid request; the server marks that refusal HodlOdds-Charged: no. SDK 0.3.1 requests a new offer once only if the 409 occurs before signing, with no successful or uncertain receipt. It uses the same query and repeats all price and budget checks. There is no extra spend for this unsigned offer refresh.

A board 409 with code: "offer_changed" received after a signed request is never retried automatically. With HodlOdds-Charged: no and no conflicting receipt, nothing was charged, but the client must call again; the SDK never re-signs on its own. A second automatic authorization could be settled twice if a server misbehaved. Watch loops treat a confirmed free refusal as a skip and continue on their next scheduled cycle. Uncertain payments stop the watch and require reconciliation.

Watchlists and market filters

Pass mints=[mint_a, mint_b] to restrict a board to 1–100 distinct Solana mint addresses. Duplicates are rejected locally before any request (and are a free 400 on the server). The watchlist default limit is its length; an explicit watchlist limit is 1–100. Sorting and filters still apply. The offer is bound to the exact normalized selection, including the watchlist digest, before signing. Only delivered rows are charged. answer.data["not_delivered"] reports coverage and filter facts for requested mints that were not returned; it is not a score.

hodlodds board --mints <MINT_A>,<MINT_B> --max-price 0.01 \
  --keypair ... --pay-to ... --network solana
hodlodds board --mints-file watchlist.txt --max-price 0.50 \
  --keypair ... --pay-to ... --network solana

Use one mint per line in --mints-file; blank lines and # comments are ignored. The two watchlist flags are mutually exclusive and also work with watch --board.

answer = client.board(mints=[mint_a, mint_b], max_price_usdc="0.01",
                      chain="solana", platform="pumpfun")
print(answer.data["rows"], answer.data.get("not_delivered", []))

chain and platform select the data market, independently of the network used to pay. They work on risk, last, coverage, board, watch and watch_board; CLI equivalents are --chain and --platform. Python accepts a string, comma-separated string or list. Values are case-insensitive; chain aliases or CAIP-2 IDs are accepted. pump and pump.fun are aliases for pumpfun. Lists contain 1–10 distinct supported values, with OR within a list and AND across the two filters. Unsupported or contradictory values are refused before payment. Omitting the filters preserves the existing default selection.

Use client.markets() / hodlodds markets to see supported values; client.coverage(mint) / hodlodds coverage <MINT> explains whether a token is covered. Paying on Base does not select Base token data. Experimental non-SOL rankings remain outside paid boards and can appear in free risk-route refusals.

Watching a token

The watch loop runs entirely in the client. Choose an integer interval from 1 to 60 minutes; --max-spend is required and caps the whole watch in USDC. --max-price still limits each offer. Examples (mainnet; pin the published recipient):

hodlodds watch <MINT> --every 1 --max-spend 1.00 \
  --keypair ~/.config/hodlodds/wallet.json --pay-to <RECIPIENT> --network solana
hodlodds watch <MINT> --every 5 --max-spend 1.00 --max-calls 20 --alert-above 0.20 \
  --keypair ~/.config/hodlodds/wallet.json --pay-to <RECIPIENT> --network solana
hodlodds watch --board --limit 100 --sort riskiest --max-price 0.50 --every 5 --max-spend 2.00 --alert-above 0.20 --json \
  --keypair ~/.config/hodlodds/wallet.json --pay-to <RECIPIENT> --network solana

Mainnet still requires explicit --network solana or --network base and --pay-to <recipient>. All existing board filters are supported with --board. The default per-call maximum remains 0.01; raise it explicitly for a larger board.

Estimated continuous costs, before skips or the total cap:

The token estimate uses the advertised 0.01 price. Board estimates use the full requested limit at 0.005 per coin, even when fewer coins match or --max-price is lower. Actual spending uses the exact atomic USDC amount in each checked offer. The loop stops before signing an offer that would exceed the remaining cap. Caps must be positive with at most six decimal places; pass decimal strings to avoid float arithmetic before calling the SDK. There is no default spending cap.

Cycles start on UTC minute boundaries at :25 plus 0–5 seconds of jitter; five-minute watches use :00, :05, :10, and so on. The first call waits for the next scheduled boundary. Slow requests or consumers skip missed slots rather than catching up. Every cycle checks the free /v1/status first:

• A feed whose state is not live produces a skipped result without payment. --stop-on-stale ends after that result; otherwise monitoring continues.
• If as_of equals the last paid answer's minute (or is older), the loop waits ten seconds and checks status once more. If still unchanged, it skips without payment. It compares against the paid answer's as_of, since publication may advance during payment processing.
• A new live minute makes one paid-route call through the existing payment checks. The server also rechecks freshness before serving a paid answer. The watch never uses the stale /last route.

A score is valid only until the next minute's update. Watching every five minutes saves money but leaves gaps between current scores. Feed interruptions and repeated minutes cost nothing. An empty board is also free. --max-calls counts paid-route calls, including free empty boards; skipped status checks do not count and a watch can keep waiting during an outage.

Text output shows UTC time, as_of, odds to one decimal percent (below 0.1% it prints <0.1%, never 0.0%), confidence, and total spend/cap. ALERT marks odds at or above the threshold (0 to 1). Boards print a summary and each row meeting the threshold. --json emits one JSON object per cycle: all answer fields plus watch containing cycle, spent_usdc, cap_usdc, skipped_reason, utc and alert. Skipped cycles contain the status fields instead of a paid answer. Amounts are exact decimal strings; skipped_reason is null for answers. Estimates and stop/error messages go to stderr, keeping stdout valid JSON Lines.

# Use the configured client from the Python example above.
watch = client.watch(mint, every_minutes=5, max_spend_usdc="1.00",
                     max_calls=20, alert_above=0.20, stop_on_stale=False)
print(watch.estimate)  # available immediately, before any request
try:
    for answer in watch:
        print(answer.data, answer.watch, answer.payment)
finally:
    watch.close()

board_watch = client.watch_board(every_minutes=5, max_spend_usdc="2.00",
                                 limit=100, max_price_usdc="0.50", max_calls=4)
board_watch.close()

Both methods return a closeable iterator backed by a generator, yielding Answer objects. answer.alerts holds matching rows; watch.spent_atomic exposes the integer spend, and watch.stop_reason explains a normal limit or interrupt stop. The caller owns and closes the client. Closing the iterator or pressing Ctrl-C between cycles stops cleanly. An interrupt during an authorized request is reported as ambiguous with reconciliation details.

After signing, a refusal marked HodlOdds-Charged: no without a successful payment receipt releases the reserved spend and yields a skipped result; the watch continues. It counts toward --max-calls. An ambiguous payment, a conflicting successful receipt, or another payment error stops the watch; there is no payment retry or automatic redemption. An unresolved attempt remains reserved in spent_atomic. Python receives HodlOddsError.payment; the CLI saves a private pending-payment file for explicit redemption as described below. Other request errors and rejected offers also stop the loop. Do not start another watch after an ambiguous payment until it is reconciled.

If an answer is lost after you paid

The paid request waits up to 90 seconds (paid_timeout, 30–600). If the connection ends after authorization, keep the pending record and use explicit recovery instead of paying again:

• An eligible settled payment whose answer was not delivered can be redeemed once within 24 hours; a redeem still checks the route and answer eligibility.
• In Python, the error carries it: client.redeem(error.payment) re-sends the same authorization with HodlOdds-Redeem: 1. It never signs a new payment and never settles a second time.
• The CLI saves it to ~/.config/hodlodds/pending/<id>.json (mode 0600) and prints the path; run hodlodds redeem <file> after about two minutes.
• A 409 may mean confirmation is still pending, no redeemable payment was found, or it has already been redeemed or expired. Follow Retry-After when supplied and keep the pending record on refusal. A refused redeem signs and settles nothing new; it does not by itself prove the original payment failed.

Environment variables for the CLI: HODLODDS_BASE_URL, HODLODDS_NETWORK, HODLODDS_KEYPAIR, HODLODDS_PAY_TO, HODLODDS_MAX_PRICE. Exit status: 0 success, 1 refusal/API/transport failure, 2 invalid usage.

Safety rules built into the client

• A payment is signed only after the 402 offer passes every check: x402 v2, the chosen network, exact USDC, authorization flow, the pinned payTo, a valid facilitator fee payer distinct from you on Solana, a bounded timeout, and a price at or below your limit (default 0.01 USDC; hard cap 1 USDC for risk/last and 2.5 USDC for board; exact atomic arithmetic).
• Payments are never retried automatically. If anything goes wrong after an authorization was sent, the error says so and carries the details (HodlOddsError.payment) so you can reconcile against your wallet history or redeem the answer once (see above).
• The key file must be a regular, non-symlink file with mode 0600. It is read locally and never printed or sent; only the SDK-signed USDC transfer authorization leaves your machine. Use a dedicated low-balance wallet.
• HTTPS only (plain HTTP only for a local test server). No redirects, no environment proxies, bounded headers and bodies.
• Mainnets require an explicit network="solana" (or "base") and a pinned pay_to; the CLI requires --network solana|base --pay-to ... on the command line.

Test wallet (devnet / Base Sepolia)

hodlodds-wallet new ~/.config/hodlodds/my-devnet.json   # prints the public address only
hodlodds-wallet new --network base-sepolia ~/.config/hodlodds/base-sepolia.json

Fund it with test USDC at https://faucet.circle.com (network: Solana Devnet or Base Sepolia). Never put real funds in a test wallet.

Tests

python -m unittest discover -s tests -v

The tests run offline with a fake server and a fake SDK seam; with the pinned SDK installed, additional tests build real signatures with all RPC calls mocked.

Disclaimer

Odds, not guarantees. Not financial advice. Low odds do not mean a token is safe; collapses can happen without warning. The operator also runs an independent trading system that may trade tokens HodlOdds scores; it never receives customer requests or purchases, and nobody can pay to change a score.

License

MIT