Sign in to the console → paste a URL → the system detects the shape, generates a free showcase tool plus paid tools, and submits for review. Once approved it appears in the MCP tool list within 60 seconds.
Best for: data owners who already expose a JSON endpoint.
Open consoleSend us the source (API docs, Excel/CSV, database export, crawler output). We handle cleaning, tool slicing, pricing advice, listing and review — live within 48 hours, then it's yours to run. Billed per source: ¥499 for one, ¥399/source from 3, ¥299/source from 10.
Best for: teams whose data is valuable but have no one to build the API.
Email usWe keep the crawl fresh, monitor coverage and quality scores, and split revenue by agreement. Every call is itemized in the settlement panel, exportable as CSV.
Best for: data owners who want rent, not ops.
Discuss termsOne price per source — you pay for exactly how many you list. Different slices of the same endpoint (by chain, by sector, by time window) count as sub-tools of one source and are not billed separately.
| Sources | Unit price | One-time total | You save |
|---|---|---|---|
| 1 | ¥499 / source | ¥499 | — |
| 3–9 most picked | ¥399 / source | ¥1,197 – ¥3,591 | 20% off |
| 10–19 | ¥299 / source | ¥2,990 – ¥5,681 | 40% off |
| 20+ | Fully managed | Revenue share | Not per unit |
Launch-period pricing; standard rates go up with scheduling load and source complexity. Payment in USDT / USDC or bank transfer (RMB amounts convert at the agreed rate on the invoice date). One source goes live within 48 hours, batches schedule at one working day per source; any source we cannot list is refunded in full, per unit.
One independently priced dataset: a JSON endpoint, a table, or one crawler topic. Slices of the same endpoint (by chain, sector or time window) ship as sub-tools of that source at no extra charge.
A hard review rule: each source ships at least one free tool (agents try before they buy) plus one paid tool. You set the paid price; the platform takes no cut.
Sources touching exchange terms, non-commercial licences or third-party reposts are confirmed before we count them. If it cannot be confirmed, it is not listed and that unit is not charged.
New crawlers, cleaning scripts or image OCR are quoted separately via 51kaifa.app. If a reachable JSON endpoint already exists, that work is included.
Paste a JSON URL, or hand the data to the managed-listing channel.
We auto-detect array structure and generate a free list tool plus paid search/detail tools. Prices are editable.
Human review of licensing and quality (at least one free tool is mandatory), then it goes live.
Agents find you via MCP and the x402 discovery layer; Base USDC settles per call.
x402 protocol: an unauthenticated call gets a 402 price quote; pay one on-chain USDC transfer and retry. One-step conversion.
Every tool automatically enters tools/list at feegate.org/mcp — plug-and-play for Claude and other MCP clients.
The settlement panel shows every call, amount and on-chain tx hash (verifiable on Basescan), with CSV export.
Source yields.llama.fi/pools — one pasted URL auto-detected 15,996 pools and sliced into a free list plus a paid search ($0.02/call). Agents call it straight from MCP:
tools/call defillama.list → 200 rows (chain/project/APY/TVL)
Browse live data toolsSource api.coingecko.com — top 100 by market cap, auto-sliced into a free list plus a paid search ($0.02/call). Root-level arrays are detected too:
tools/call coingecko.list → 100 rows (price/mcap/24h)
Try the free REST callThe raw yields.llama.fi pools are already open in full in the free zone, so nothing raw is resold here — what sells is filter + sort + parameter: stablecoins only, TVL > $5M, APY < 50%, ordered by APY descending.
top5 free · top20 $0.10 · by_chain $0.10 (takes a param)
measured: Base USDC 26.62% / ETH SUSDFR 26.05%
Try self-serve first (free, 5 minutes): ⚡ One-click listing or email brian@51kaifa.app about managed listing.
No payment up front. We first check whether your endpoint can actually be read reliably, then send a split plan and a price. If it cannot be read, you are not charged.