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Platform review

Space review

Prediction markets on Solana; no terms or documentation published

Crypto❌ Unavailable

In United States: Terms of Service (no date shown) state the Services are not available to US Persons, including those accessing from US territory.

Risk flags

Flags are rules over the facts on record, the same for every platform — how they work.

Verified documents & product scope

Check country eligibility

Choose the country you want to check. This lookup does not change your site region or establish individual account approval.

What fees does Space charge?

Space runs an order book where “traders adding liquidity to the order book via limit orders (makers) pay 0 fees”; takers pay a fee set by the market’s probability. The buy fee falls from 2.00% at a 0% probability to 0.02% at 100%; the sell fee peaks at 1.00% at 50% and tapers to 0.02% at either end, and a position held to resolution pays no sell fee.

Rates “may vary based on Market conditions”; fees are refunded if a market is voided. No deposit or withdrawal fee is stated (docs.into.space, read 2 Oct 2026).

These are document checks, not a funded-account test. Access may depend on residence, physical location, account approval and the contract category. Check the operator’s current terms before depositing.

Learn how play-money and real-money markets differ, use the fee and payout tools, or read our review methodology.

See our Platform documentation audit for the method and downloadable source register.

  • Space Terms of Use — checked

    The terms identify SYNAPSE LABS INC in Panama, describe USDC trading and non-custodial infrastructure, and state that Space holds no financial-services licence. They describe possible leverage and liquidation risks. The token public-sale restriction list must not be presented as a verified list for every trading feature.

  • Space dynamic fee curve — checked

    Buy fee 2.00% → 0.02% as probability rises; sell fee peaks at 1.00% at 50%; makers pay 0. The page’s own worked example at 80% is inconsistent, so the formula is cited.

  • Space Terms of Use — checked

    Maker orders incur no fee; taker rates are dynamic and may change with notice.

  • Space invalid markets — checked

    Fees are refunded when a market is voided.

Pros and cons

What works

  • Crypto markets resolve on a 15-minute TWAP with Pyth primary and Switchboard as a named fallback — manipulation-resistant by design
  • Real-world events require a 2-of-3 operator multisig rather than a single key
  • Publishes terms at all, which several venues in this cohort do not
  • Documents a 24-to-48-hour flagging route for incorrect resolutions

What doesn’t

  • The terms grant no right to flag: resolution criteria are “final and binding” and you waive claims over data sources, delays and voiding
  • Space “may cancel or void a Market at any time” and may extend the resolution period at sole discretion
  • It reserves the right to modify the underlying smart contracts at any time, which sits above the TWAP design
  • The AI validation step is undescribed — no model, inputs or evidence standard
  • The site carried no link to terms, privacy, legal, docs, about or FAQ, and /terms returned HTTP 500
  • No volume or depth data is published

Public website & interface

Dated website captures for identification and interface context. Displayed prices are historical; these images do not establish account eligibility or a funded-account test.

Prices and liquidity

We do not currently publish live quotes for Space. Check the platform’s order book before placing an order: the last trade can differ from the price available for your position size.

How to assess liquidity and spreads →

Crypto markets here are genuinely deterministic

The best part of Space is its crypto resolution, and it is worth describing precisely because it is the kind of design that removes discretion rather than relocating it. “Markets resolve using a 15-minute Time-Weighted Average Price ending at market expiry”, with “Primary: Pyth Network” and “Fallback: Switchboard”.

A time-weighted average over fifteen minutes is specifically a defence against manipulation at the instant of settlement: moving a price for one block is cheap, and moving its average across fifteen minutes is not. Naming a primary and a fallback oracle in advance removes the “which source do we use” argument that decides contested settlements elsewhere. On its crypto markets, this venue does not need to be trusted.

Real-world events run on a multisig and an AI check

Events that are not price-based go through a different path: “2-of-3 operator multisig submits resolution”, with “AI validates outcome against evidence before on-chain submission” and a block if “AI disagrees”.

Requiring two of three operators is a real control against a single compromised key. The AI validation step is harder to assess — the documentation does not describe the model, its inputs or its evidence standard, so what it actually blocks is unknown to a reader. It is a check whose strength cannot be evaluated from outside.

The documentation also describes a user route: 24 to 48 hours during which “Users can flag incorrect resolutions”, after which “Flagged markets go to admin review”. Read on its own, that looks like a dispute mechanism.

The terms and the documentation describe different venues

The terms of use grant no such right and foreclose the argument entirely: “Resolution criteria are final and binding. Space does not adjust outcomes based on a User’s subjective interpretation of an Event”, and “You waive any claim against Space arising from the designation of an alternative data source, delayed resolution, or voiding of a Market.”

So flagging is a product feature the venue may act on, not an entitlement you hold. The distinction matters exactly when it counts — when you flag something and nothing happens, the terms are the document that governs, and they say you waived the claim.

The override is explicit in both documents and worth quoting together: “Multisig can mark markets invalid if: … Resolution would be clearly unjust”; “Space reserves the right to extend the resolution period at its sole discretion”; “Space may cancel or void a Market at any time”; and “Space reserves the right to modify the smart contracts underlying this mechanism at any time.” The last of those sits above the TWAP design described in the first section.

What the site itself does not say

On 8 September 2026 the page carried no link matching terms, privacy, legal, docs, about or FAQ, and /terms returned HTTP 500. Everything we record about this venue beyond its documentation subdomain comes from its own page title and category navigation.

The venue publishes no volume or depth data, and nothing in its interface indicated books comparable to the leaders when we read it. That mark is scored on the same basis as its peers rather than on figures of our own, and it should be revised the moment somebody takes a real measurement.

Credited, on balance, for the TWAP design and for publishing terms at all — two things several venues in this cohort do not manage. The gap between what those terms say and what the documentation promises is the reason the rating is where it is.

Space FAQ

How do Space crypto markets resolve?

Deterministically, and this is the venue’s strongest feature. “Markets resolve using a 15-minute Time-Weighted Average Price ending at market expiry”, with “Primary: Pyth Network” and “Fallback: Switchboard”. A fifteen-minute average is specifically a defence against manipulating the price at the instant of settlement, and naming the primary and fallback oracle in advance removes the argument about which source to use. On its crypto markets the venue does not need to be trusted.

Can I challenge a Space resolution I think is wrong?

The documentation describes a 24-to-48-hour route where “Users can flag incorrect resolutions”, after which “Flagged markets go to admin review”. The terms of use grant no such right: “Resolution criteria are final and binding”, and “You waive any claim against Space arising from the designation of an alternative data source, delayed resolution, or voiding of a Market.”

So flagging is a product feature the venue may act on, not an entitlement — and the terms are the document that governs when you flag something and nothing happens.

What is Space prediction market?

A prediction market on the Solana blockchain covering crypto, politics, sports, technology, economics and culture. Its documentation says crypto markets resolve on a 15-minute time-weighted average price from Pyth, with Switchboard as fallback, and other events through a 2-of-3 operator multisig checked by an AI model.

Is Space prediction market legit?

We could not establish who runs it. Its website names no operator and links no terms or privacy policy. The terms in its documentation (docs.into.space) make resolution decisions final, let Space void markets or change its smart contracts at any time, and exclude US residents. No licence is claimed. Treat it as unregulated and high-risk.

What fees does Space charge?

Space runs an order book where “traders adding liquidity to the order book via limit orders (makers) pay 0 fees”; takers pay a fee set by the market’s probability. The buy fee falls from 2.00% at a 0% probability to 0.02% at 100%; the sell fee peaks at 1.00% at 50% and tapers to 0.02% at either end, and a position held to resolution pays no sell fee.

Rates “may vary based on Market conditions”; fees are refunded if a market is voided. No deposit or withdrawal fee is stated (docs.into.space, read 2 Oct 2026).

Is Space regulated?

Publishes no terms, no privacy policy, no documentation and no operating entity. On 8 September 2026 the page carried no link matching terms, privacy, legal, docs, about or FAQ, and /terms returned HTTP 500. What is recorded here is what the venue states about itself in its own title — “Space - Prediction Markets on Solana” — and its own category navigation.

UNVERIFIED, because nothing states them: the operating entity, its jurisdiction, any licence, the deposit currency, every fee, the minimum deposit, withdrawal terms, whether identity verification is required, and which countries are excluded.

What can you trade on Space?

Event contracts on crypto, politics, sports, economics and entertainment. Individual markets open and close, so check the live list before depositing.

Alternatives to Space

Chosen by similarity — the same kind of venue, overlapping markets, and whether you can use it where you are — then by Editor Score.

Authorship

Written by Prediction Markets Best editorial