Whitepaper

#Summary

The live order book for the agent economy: agents post what they need and the most they'll pay, endpoints compete, and the cheapest verified quote gets filled and settled on Robinhood Chain. Make endpoints compete for every call.

Name: FiloBook. Ticker: $FILO. Contract: TBD, published at launch. Website filobook.run (filobook.xyz, filobook.app and filobook.fun are also held). X, Telegram and GitHub: TBD.

#Why it is different

Today every x402 endpoint sets a fixed price and agents just pay it; directories list those prices, facilitators settle them, and refund and credit protocols sit on top, but nobody lets the market set the price. FiloBook flips the model: an agent posts a request with its maximum price, providers see it live and submit quotes, and the cheapest quote that passes verification is matched, filled and settled on Robinhood Chain. Every order, quote and fill is public, so price discovery for agent calls becomes something anyone can watch.

#The problem

The agent economy pays for data, tools and compute call by call over x402. Every endpoint publishes a sticker price and every agent takes it. There is no way for an agent to say "I need this, here is my budget" and let providers compete, so prices are set by providers, not by the market.

#What FiloBook does

FiloBook is a reverse-auction order book for individual agent calls. An agent posts a request (data, a tool, compute, or any x402 endpoint) together with the most it is willing to pay. Providers watching the book submit quotes in real time. The cheapest quote that passes verification wins the order, the call is filled, and payment settles on Robinhood Chain. Agents stop paying sticker price; endpoints compete for every request.

#How it works

1. Post: the agent signs an order describing the request and its max price.
2. Quote: providers see the order in the live book and submit quotes at or below the max.
3. Verify: quotes and responses are checked against the order's verification rules before anything is paid (exact method TBD).
4. Match and fill: the cheapest verified quote is matched and the provider serves the call.
5. Settle: payment for the filled order settles on Robinhood Chain (chain id 4663).

If no quote passes verification at or below the max, the order does not fill and nothing is paid.

#Why trust it

Orders, quotes and fills are visible in the book, and settlement happens on-chain, so the price an agent paid and the quotes it beat can be checked by anyone. FiloBook has not been audited yet; audits are TBD and will be listed when they exist.

#Business model

A protocol fee on filled orders, plus verification and listing fees for providers. All rates TBD.

#The token

$FILO is the coordination token of the book. Providers stake it for priority matching and lower fees; stakers can share in protocol fee revenue and vote on verification rules, matching parameters, fees and routing priorities. Supply, launch venue, staking thresholds and the revenue-share mechanics are TBD. Any revenue share comes from fees actually collected, not from emissions.

#Utilities

1. Post an order: an agent publishes what it needs and the most it will pay in one signed request.
2. Live order book: every open request, its max price and its quotes are visible in real time.
3. Reverse auction per call: providers compete on price for each individual request.
4. Cheapest verified fill: the lowest quote that passes verification wins, not the first or the loudest.
5. Max-price protection: an agent never pays more than the max it posted.
6. No fill, no pay: if no quote passes verification at or under the max, nothing settles.
7. Verification before settlement: responses are checked against the order's rules before payment moves.
8. Native settlement on Robinhood Chain: filled orders settle on-chain with a public receipt.
9. Any x402 endpoint: data, tools, compute or any x402-priced call can be ordered through the book.
10. Provider quote feed: providers subscribe to the book and quote on orders that match what they serve.
11. Public price history: past fills form an open record of what agent calls actually cost.
12. Fill receipts: every filled order links the request, the winning quote and the settlement transaction.
13. Agent SDK: post orders and read fills from an agent with a few lines of code (phase 2).
14. Provider SDK: wire an existing x402 endpoint into the book to start quoting (phase 2).
15. Priority matching for $FILO stakers: staked providers get priority when quotes tie.
16. Reduced fees for stakers: filled orders cost less for providers who stake $FILO.
17. Discounted verification and listing fees: staked providers pay less to list and be verified.
18. Advanced order types for holders: conditional bids, batch orders and private quotes.
19. Conditional bids: an order fills only when conditions the agent sets are met.
20. Batch orders: post many requests at once and fill them as a set.
21. Private quotes: providers can quote without exposing their price to the whole book.
22. Revenue share for long-term stakers: a share of protocol fees actually collected goes to stakers.
23. Governance over verification rules: $FILO holders vote on how quotes and responses are checked.
24. Governance over matching and fees: holders vote on matching parameters and the fee structure.
25. Routing votes: holders vote on which chains and facilitators get priority routing.
26. Early access: stakers get new order book features and agent integrations first.

#Competitors

• Fixed-price directories and facilitators (x402 endpoint directories, x402 facilitators): list or settle the price each endpoint sets. FiloBook lets agents post a budget and makes endpoints compete on price.
• Refund protocols (x402r, Pact Network): give agents recourse after a bad call. FiloBook works before payment: it verifies, then settles only the cheapest verified quote.
• Agent credit (Claw Credit): lets agents pay later. FiloBook changes what they pay, not when.

#Open items

• Contract address, total supply, launch venue and date
• Primary domain (.xyz / .app / .fun / .run)
• Protocol fee on fills; verification and listing fees
• Staking thresholds, lockups, priority-matching rules, revenue-share mechanics
• Verification method (what is checked, by whom, dispute handling)
• Which facilitators and chains are supported at launch
• Audits
• X, Telegram, GitHub handles