Pay per call. No subscriptions.

Transparent pricing for every endpoint.

Agents pay with USDC on Base via the x402 protocol. No API keys, no accounts, no monthly fees. Free endpoints for discovery. Premium endpoints for high-value data.

Endpoint Price Type Why
SG Stamp Duty
/bsd /absd FREE Computed math Cheap to serve. Drives discovery.
SG Address Intelligence
/address /mrt FREE Static data District, region (CCR/RCR/OCR), MRT proximity.
SG Income Tax
/tax/income FREE Computed math Resident progressive, non-resident flat.
SG GST
/gst FREE Computed math Add or remove 9% GST.
SG Commission
/commission FREE Computed math Agent commission by property type.
SG CPF Housing
/cpf/housing FREE Computed math OA accumulation for housing.
SG Salary Benchmark
/salary/search FREE Live data Real employer-posted salary from MyCareersFuture.
SG Property Tax
/property-tax FREE Computed math IRAS progressive rates.
SG Buy-vs-Rent
/buy-vs-rent FREE Computed math Total cost comparison with opportunity cost.
SG School Proximity
/schools FREE Static data 294 schools. Within 1km/2km for P1 priority.
HDB EIP/SPR Quota
/hdb/eip FREE Rules Ethnic integration policy + SPR quota limits.
HDB Lease Decay
/hdb/lease-decay FREE Rules Financing/CPF restriction timeline.
Postal District Mapper
/postal FREE Static data No external calls needed.
Mortgage Calculator
/mortgage FREE Computed math Standard amortization formula.
Investment Growth
/invest FREE Computed math Compound interest formula.
Currency Converter
/currency FREE Live data ECB rates, cached hourly.
Premium data endpoints
Rental Yield
/rental-yield $0.005 / call Investment analysis Decision-grade output for underwriting.
SG Affordability (TDSR/MSR)
/affordability $0.01 / call MAS/HDB rules Multi-step regulatory computation.
HDB Resale Data
/hdb $0.01 / call Government data Live from data.gov.sg. Costs to fetch.
URA Transactions
/ura/transactions $0.05 / call Exclusive data Private property caveat-level data. URA API.
URA Median Rentals
/ura/rental-median $0.05 / call Exclusive data Private rental rates by project. URA API.
URA Developer Sales
/ura/developer-sales $0.05 / call Exclusive data Units sold by developers. URA API.
URA Pipeline Supply
/ura/pipeline $0.05 / call Exclusive data Future supply pipeline. URA API.
SG Property Analysis
/property/analyze $0.05 / call Composite Full analysis: stamp duty + comps + yield + location.
SG Property Pitch
/property/pitch $0.05 / call Composite Client-ready investment thesis one-pager.
SG Property Ranking
/property/rank $0.10 / call Composite Multi-property comparison with transparent scoring.

How payment works

Every paid endpoint uses the x402 protocol:

1
Agent requests dataServer responds with HTTP 402 + payment instructions.
2
Agent pays USDC on BaseOn-chain micropayment. Gas < $0.001.
3
Server verifies + returns dataFacilitator validates payment. Data returned in same request.

For providers

You set the price for every endpoint. From $0.0001 to any amount. Revenue settles to your wallet in USDC on Base. No invoicing, no payout delays.

Platform fee: 3% on successful calls. If your API doesn't earn, you don't pay.

Publish your API
Payment flow example
# 1. Agent requests HDB data (no payment header)
curl https://bountyapi.com/hdb/towns

# HTTP 402 Payment Required
# PAYMENT-REQUIRED header with payment instructions

# 2. Agent pays and retries with payment proof
curl https://bountyapi.com/hdb/towns \
  -H "PAYMENT-SIGNATURE: <base64-usdc-payment>"

# 3. Server verifies, settles on-chain, returns data
{ "total_towns": 24, "total_transactions": 4000, ... }
Bounty API · Singaporev1.8.0 · 31 APIs · 27 MCP tools