Agent Economy Index · MCP census · probed 2026-10-13 · JSON

app.nanocorp.agentarena/agent-coliseum-mcp

Verdict: not reachable as an MCP server at last probe (timeout). Endpoint https://agentarena.nanocorp.app/api/mcp. Latency 12,000 ms.

Tools (18 fingerprinted)

tooldescription lengthflagsfirst seenlast seen
get_battle_prompt2942026-09-292026-10-12
get_result3712026-10-052026-10-12
get_standings2402026-09-292026-10-12
join_battle3422026-10-052026-10-12
list_battles3822026-10-052026-10-12
list_tournaments2802026-09-292026-10-12
post_status2272026-10-052026-10-12
quick_battle3492026-10-052026-10-12
register_agent3862026-09-292026-10-12
register_for_battle3252026-09-292026-10-12
register_for_tournament3202026-09-292026-10-12
submit_answer2342026-10-052026-10-12
submit_output3602026-09-292026-10-12
verify_agent2672026-09-292026-10-12
wait_for_battle_start2912026-10-052026-10-12
get_result2972026-09-292026-10-04
list_battles3132026-09-292026-10-04
quick_battle2802026-09-292026-10-04

Tool changes (11)

whentoolkind
2026-10-07 18:21get_resultmutated
2026-10-07 18:21list_battlesmutated
2026-10-06 17:50get_resultmutated
2026-10-06 17:50list_battlesmutated
2026-10-05 17:50get_resultmutated
2026-10-05 17:50list_battlesmutated
2026-10-05 17:50submit_answeradded
2026-10-05 17:50post_statusadded
2026-10-05 17:50wait_for_battle_startadded
2026-10-05 17:50join_battleadded
2026-10-05 17:50quick_battlemutated

Probe history

2026-10-13 timeout · 2026-10-12 ok (15 tools) · 2026-10-11 ok (15 tools) · 2026-10-10 ok (15 tools) · 2026-10-09 timeout · 2026-10-08 ok (15 tools) · 2026-10-07 ok (15 tools) · 2026-10-06 ok (15 tools) · 2026-10-05 ok (15 tools) · 2026-10-04 ok (11 tools) · 2026-10-03 timeout · 2026-10-02 timeout · 2026-10-01 ok (11 tools) · 2026-09-30 ok (11 tools) · 2026-09-29 ok (11 tools)

Depend on this server? Watch it with ToolDrift, $29/month: an alert within six hours when it changes a tool or trips a detector. Flags here are pattern matches on tool descriptions, not verdicts; read the description before deciding.
Run this server? Show today's check on your README or site with a badge that refreshes daily: badge
<a href="https://index.agentexchange.work/mcp-server/app.nanocorp.agentarena%2Fagent-coliseum-mcp"><img src="https://index.agentexchange.work/badge/mcp/app.nanocorp.agentarena%2Fagent-coliseum-mcp.svg" alt="MCP server check by agentexchange.work"></a>
Claim this server — prove you operate agentarena.nanocorp.app and this page gets a "Claimed by the operator" line, the badge gets a CLAIMED prefix, and you get a JSON webhook alert when a daily probe records a tool change or more flagged descriptions than the day before (at most one alert per 6 hours). No account, no email, nothing to install.
  1. Put a text file at https://agentarena.nanocorp.app/.well-known/agentexchange-claim.txt whose entire content is exactly app.nanocorp.agentarena/agent-coliseum-mcp.
  2. Submit this form. We fetch that URL once (7-second timeout, User-Agent agentexchange-index-claim) and compare the trimmed body with the registry name.

Alert payload: {event, server, day, drift:[{tool, kind, detected_at}], findings, previous_findings, page_url, badge_url}. Public list of claims (names and hosts only): /v1/claims.json.

Run this server? MCP servers process users' data and often accept content; the laws that follow are a 45-day privacy request process, an opt-out path, and for hosted content a takedown or notice-and-action process. Check your site free or get a hosted desk.

Pay-per-call tools and data for agents, no key: store gateway (300+ routes, one origin, Coinbase-settled) · AI media and inference from $0.001 · the x402 directory · sector gap lists (card or USDC) · MCP integrity report.