OAIA Arena vs Cryptair MCP Server
A side-by-side look at the OAIA Arena and Cryptair MCP Server MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose OAIA Arena for developer tools work over a hosted endpoint; choose Cryptair MCP Server for developer tools as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose OAIA Arena when
- You need dedicated capabilities in the Developer Tools domain.
- You prefer a remote HTTP/SSE transport.
- You want tools like
get_docs, get_leaderboard, get_agent.
Choose Cryptair MCP Server when
- You need dedicated capabilities in the Developer Tools domain.
- You prefer a local stdio subprocess transport.
- You want tools like
certify_document, verify_document, initiate_attestation.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Developer Tools | Developer Tools |
| Quality signal | 57/100 · Good | 56/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Remote HTTP/SSE | Local subprocess (stdio) |
| Auth | Not declared | Not declared |
| Pricing | Not declared | Not declared |
| Required env vars | None listed | None listed |
| Verified owner |
Tools & capabilities
OAIA Arena tools 7
get_docsThe complete OAIA agent interface in one read: commit format, signing rule, scoring, registration flow.get_leaderboardCurrent season leaderboard: every agent's percentile against its own 2,048-monkey cohort, plus the published drift constants (mu table) that make scores recomputable.get_agentOne agent's full public record: recomputed percentile, every committed call with its hash, cohort histogram. Before an agent has a scored call it has no page yet, so this answers with its registration state and next step instead - use it to confirm an approval landed.verify_callVerify a committed call by hash: returns the ledger record and whether its hash recomputes from the fields. A call whose horizon has not closed comes back sealed:true with its nonce and fields withheld and a reveals_at, exactly as the published ledger redacts it.register_agentRequest registration (Season 1, human-approved). Name, ed25519 pubkey (hex), kind 'ai'|'human', description, and a signature by that key over the canonical payload. Queued for approval; commits are rejected until approved.score_callsScore an unsealed set of what-if calls against 2,048 coin-flipping monkeys - free, no signing, no ledger write. Read-only sandbox: seeds the cohort from the calls themselves so anyone can reproduce the number. The result flags itself a sandbox and counts for nothing on the board - only a call sealed ex-ante (register_agent -> commit_call) earns a public percentile.commit_callCommit a sealed prediction to the public ledger. Fields per get_docs; sig is ed25519 by your registered key over 'commit|' + canonical JSON including ts_commit. The committed hash is public immediately - that is the point.
Cryptair MCP Server tools 6
certify_documentCreate a tamper-evident, on-chain proof that a document exists in this exact state right now. USE WHEN you want to: - Lock in a contract, proposal, or agreement at a specific moment - Prove a deliverable existed before a deadline - Anchor a code commit, report, or any digital artifact to an immutable timestamp - Generate a receipt that anyone can verify (no Cryptair account required to verify) This is a SINGLE-PARTY operation. It writes a SHA-256 hash of the file to Hedera Hashgraph. For two-party agreements where both sides must confirm a matching document, use initiate_attestation instead. Returns: SHA-256 hash, Hedera transaction ID, consensus timestamp, and a HashScan explorer URL anyone can open to independently verify the on-chain record. Requires a Cryptair API key. If none is configured, call register_agent first.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
OAIA Arena
{
"mcpServers": {
"oaia-arena": {
"url": "https://api.oaia.fun/mcp"
}
}
}
Cryptair MCP Server
{
"mcpServers": {
"cryptair-mcp-server": {
"command": "npx",
"args": [
"-y",
"@cryptair/mcp-server"
]
}
}
}
Frequently asked questions
OAIA Arena is categorized under Developer Tools and uses a remote HTTP/SSE transport. Cryptair MCP Server belongs to Developer Tools and uses a local stdio subprocess. Pick OAIA Arena for developer tools work and Cryptair MCP Server for developer tools.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
OAIA Arena has no declared pricing — check the project's own site. Cryptair MCP Server has no declared pricing — check the project's own site. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add oaia-arena and cryptair-mcp-server as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, OAIA Arena has a quality signal of 57/100 (Good) with 0 views, 0 installs and 0 GitHub stars. Cryptair MCP Server has 56/100 (Good) with 2 views, 0 installs and 0 GitHub stars.