Space review

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.

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 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.

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.