Rain prediction market review

Status hint

Live

Venue type

on-chain AMM prediction-market protocol

Outcome types

binary, categorical

Chains

Arbitrum

Mechanisms

amm

Last reviewed

2026-08-10

Official materials describe public markets as open to anyone and the protocol as borderless; no binding restricted-country list was located.

Official materials describe public markets as open to anyone and the protocol as borderless; no binding restricted-country list was located.

Rain is classified here as a on-chain AMM prediction-market protocol, with structured references to binary and categorical outcomes and Arbitrum. Those labels provide a comparison starting point, not a complete product specification. The structured status is live, while actual access and market activity must be checked directly. The retained research status reads "live": Official help and developer documentation expose public-market participation, authenticated SDK calls, trading, claims, and dispute transactions.

Confirmation belongs at https://rain.one/, including whether Rain still offers the described product. A valid HTTPS response is not equivalent to verified trading availability. The claims below remain limited to what the cited material supports.

A careful comparison should keep Rain's three supported dimensions separate—formats (binary and categorical), mechanics (amm), and chain context (Arbitrum). None supplies evidence about profitability, legal availability, depth, or security. The resulting profile favors a smaller defensible claim set over apparent completeness.

Rain's retained sources describe regional or eligibility boundaries, but readers should still check the current terms before access. Research summary: Official materials describe public markets as open to anyone and the protocol as borderless; no binding restricted-country list was located.

For Rain, status and eligibility are distinct questions. The live hint says nothing definitive about a specific reader's legal or operational access. KYC summary: No identity-document requirement is stated; wallet signatures are used for authenticated sessions.

Rain is associated with binary and categorical outcome formats and mechanism labels of amm. These classifications do not establish its order types, price formula, collateral, leverage, or market-creation policy.

Primary rules control outcomes on Rain. Save the version reviewed and note the named data source, decision authority, challenge process, and timing before committing funds. Settlement and resolution summary: Creator resolution or Delphi AI consensus; disputes require collateral and escalate to decentralized human oracles.

The research record contains concrete cost information for Rain, without assuming that one rate applies to every product or jurisdiction. Retained fee evidence: Standard markets charge 5% of resolved-market volume; Delphi resolution adds $1 for creators. The separate Entropy Layer charges 4% of volume.

Some custody evidence is documented for Rain; that does not remove smart-contract, counterparty, signer, bridge, or account-recovery risk. Retained custody evidence: Trades and positions are on Arbitrum smart contracts using user wallets and smart accounts; exact front-end custody language was not located.

Risk review for Rain should include market loss, thin depth, disputed resolution, account interruption, smart-contract or counterparty failure, and changing legal treatment. The live label is not a safety rating. Documented limitations include: A 5% standard-market volume fee is material., Creator-selected resolution introduces discretion., and Delphi resolution depends on an AI-agent consensus before human appeal..

At https://rain.one/, confirm Rain's domain ownership signals, terms, market rules, fees, custody, and support route. Stop if signatures, deposits, or identity requests do not match documented workflows. Priority evaluation checks include: Confirm the fee regime for the selected protocol layer., Inspect the market resolver and dispute collateral., Verify current Arbitrum contract addresses., and Confirm smart-account permissions before approval..

• Confirm the fee regime for the selected protocol layer.
• Inspect the market resolver and dispute collateral.
• Verify current Arbitrum contract addresses.
• Confirm smart-account permissions before approval.
• Confirm legal availability in the user's jurisdiction.
• Confirm that https://rain.one/ is the current official domain for Rain.
• Compare the "live" hint with a dated official availability notice.
• Read restricted-jurisdiction, age, sanctions, and account-eligibility terms.
• Locate the complete fee schedule, including spreads, gas, deposits, and withdrawals.
• Identify custody, collateral, wallet permissions, and the withdrawal process.
• Verify how binary and categorical markets define evidence, cancellation, disputes, and settlement.
• Confirm authentic contracts, assets, and network support for Arbitrum.

Check current product, legal and technical documentation before relying on any dated fact in this profile.