Leaderboards anyone can verify.
Rankings nobody can rig.

RankFuel is the provably-fair leaderboard and ranking-settlement layer for apps, games, communities, and AI agents. One API. One MCP server. Cryptographic proof that the standings are honest.

Get an API key — free Read the proof spec →

Cloudflare edge · provably-fair by drand · API + MCP native · pairs with Rewards Fuel

Live demo leaderboards

Golf long drive · NBA points · home run derby · March Madness pools — trending scores update automatically.

Browse live demos Sport templates MCP for agents

Every leaderboard asks you to trust it. Most don't deserve it.

When money, prizes, or reputation ride on a ranking, "trust our sort" stops being good enough.
Tiebreaks, random draws, and winner selection happen behind a curtain — users can't check.
Building race-free, multi-tenant, verifiably fair ranking is a backend project you didn't want.
Autonomous agents need to verify standings before they act — "trust me" isn't an API response.

A leaderboard is easy. A leaderboard people believe is the hard part. That's what we sell.

Three steps. Cryptographic spine.

Open — Create a leaderboard, open a period. RankFuel publishes a cryptographic commitment up front.
Compete — Scores stream in via API or MCP. Edge Durable Objects keep rankings consistent worldwide.
Settle — Lock to a future drand round, reveal the seed, write a downloadable proof. Anyone re-runs the math.

Drop-in rankings with receipts

Provably fair

Commit-reveal + drand quicknet. Publishable, re-runnable proofs.

Edge-native

Cloudflare Workers + Durable Objects. Strongly consistent, globally fast.

API-first

REST, idempotent writes, tenant isolation, typed errors.

MCP-native

Agents submit, read, and verify_ranking as native tools.

Any look

Themed embeds: sports, beauty, gaming, minimal, dark, terminal.

Settlement rails

Rewards Fuel for prizes · RFWIN for provably-fair winner picks.

Live in minutes. Honest by construction.

curl -X POST https://api.rnkfl.com/v1/leaderboards/spring-cup/scores \
  -H "Authorization: Bearer $RANKFUEL_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{ "subject_id": "player_42", "value": 9820, "subject_label": "Rob" }'

REST + MCP · idempotent writes · one-script embed · verify_ranking is a function call, not a support ticket.

RankFuel doesn't stop at the standings

RankFuel decides who's winning. Rewards Fuel delivers what they win. RFWIN proves who gets it — fairly.

Start free. Pay when it scales.

Plan	Price	Includes
Free	$0	3 leaderboards · 10k writes/mo · public proofs
Pro	$29/mo	25 leaderboards · 500k writes · all themes · MCP
Scale	$99/mo	Unlimited boards · 5M writes · RF + RFWIN rails
Enterprise	Custom	SLA · audit exports · white-label widgets

Fairness isn't an upsell — every plan includes provably-fair settlement.

Start free Talk to us

Stop asking people to trust your leaderboard.
Let them verify it.

Open dashboard Read the proof spec

Leaderboards anyone can verify.Rankings nobody can rig.