CWBase Sepolia pilot
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Sponsor-funded learning / Base
Crossword
Turn learning into a reward people can verify.
Sponsors publish a short, source-grounded lesson and fund a pool of small USDC rewards. Learners read, solve, and receive their full advertised reward through an account that feels like email. On Base, they never need ETH for gas.
- USDC
- rewards on Base
- instead of a seed phrase
- Onchain
- campaign accounting
A two-minute lesson
Sponsor fundsUSDC on Base→Learner completesLesson + crossword→Escrow paysWith sponsored gas
For sponsors
One campaign budget. Many small, accountable rewards.
Fund a campaign once, set exact reward terms, and let Crossword handle distribution. The Base ledger shows where the campaign funds went; optional contact consent stays private and separate.
Teach one useful thing
Build a brief lesson from supplied sources, then review every fact, clue, answer, and reward term before publication.
Keep every reward whole
On Base, learners receive the full advertised USDC amount. Sponsored gas and Crossword fees stay outside the prefunded reward pool.
Reconcile the promise
Funded terms, payouts, unused funds, and the final campaign balance can be checked against escrow instead of a private report.
The workflow
A campaign in four steps.
The sponsor keeps editorial and budget control. The learner gets a short experience with no wallet ceremony.
- 01
Add sources
Start from material the sponsor is prepared to stand behind.
- 02
Review the lesson
Approve the copy, crossword layout, and immutable reward terms.
- 03
Fund Base escrow
Reserve the complete USDC reward pool before learners arrive.
- 04
Share and settle
Qualified completions receive sponsored, auditable payouts.
Working proof
The hard payment path is already real.
The public experience is an early pilot. Its Base Sepolia escrow and sponsored payout have completed independently verifiable tests.
Deployed
USDC campaign escrow
Campaign funds are reserved against fixed per-person rewards and claim limits.
View contractFinalized
Sponsored smart-account payout
A fresh, zero-ETH smart account received 1 test USDC through the claim-only paymaster path.
View transactionAccepted locally
Email-first reward account
Coinbase Developer Platform creates the participant smart account behind email verification, with no seed phrase or ETH required.
Try the productMade for the open internet
Base is the product rail. Other networks would be integrations.
Base-first economics
The best experience belongs on Base.
Base campaigns have no network integration fee. Learners receive the full USDC reward, while a narrowly scoped CDP paymaster sponsors only valid claims.
Email→Smart account→Base USDC
Metered intelligence
Pay for creation, not from the reward pool.
NEAR AI can draft source-grounded material, while x402 meters the generation request. Sponsor funds remain separate and fully reserved for learners.
Sources→x402 request→Reviewed lesson
A practical take on learn and earn