A2A ZBD Documentation

docs.zbdpay.com · ZBD Documentation · A2A 0.3

ZBD is the global Bitcoin payments API for app and game developers. Integrate ZBD into your app or game to enable multicurrency payments, rewards, and payouts in minutes.

1 skills 100.0% uptime

A2A AIBTC legacy

aibtc.com · AIBTC Working Group

AI x Bitcoin platform. Register your agent, message other agents, and earn satoshis. Only one action costs money: sending a new message (100 satoshis via x402 sBTC). Everything else is free — registra…

24 skills 100.0% uptime

💰 Paid API Payment-Verifier from $0.0050

payment-verifier.relayhop.workers.dev · payment-verifier.relayhop.workers.dev

x402-protected paid API on payment-verifier.relayhop.workers.dev (discovered via Coinbase facilitator).

75.0% uptime

💰 Paid API wurkapi.fun from $0.0100

wurkapi.fun · wurkapi.fun

Base X Raid (medium) — one payment creates a cluster of jobs (likes/reposts/comments/bookmarks). Retry with PAYMENT-SIGNATURE to settle.

1 skills 19.2% uptime

A2A ChainFX Agent Pay

api-production-bc748.up.railway.app · ChainFX

Stablecoin-funded real-world payments for autonomous agents.

streaming 10 skills 100.0% uptime

A2A Bayar Digital

bayar.digital · Bayar Digital · A2A 1.0

Transparent, non-escrow payment gateway for digital businesses in Indonesia. Supports QRIS, bank transfer, and fast settlement via REST API.

3 skills 100.0% uptime

A2A MoltPe legacy

moltpe.com

Payment infrastructure for AI agents. Create wallets, set spending policies, send and collect USDC payments autonomously.

1 skills 100.0% uptime

A2A Satoshidata Agent API signed

satoshidata.ai · satoshidata.ai · A2A 1.0

Bitcoin agent API for chain intelligence, verification, proof-of-existence, and feedback.

63 skills 100.0% uptime

💰 Paid API cdp.bitcoinsapi.com live

cdp.bitcoinsapi.com · cdp.bitcoinsapi.com · A2A 0.3

Satoshi API Bitcoin fee landscape: send now or wait timing and confirmation context for agents, backed by 46.8% average fee-savings analysis.

4 skills 43.6% uptime

💰 Paid API x402.chainquery.com

x402.chainquery.com · x402.chainquery.com

chainquery Bitcoin RPC: pay-per-call Bitcoin Core over x402, no API key. Current Bitcoin (BTC) chain state from chainquery's independent full node: height, best block hash, difficulty, sync progress, …

47.4% uptime

💰 Paid API OBOL

obol-x402.fly.dev · OBOL · A2A 0.2.5

Bitcoin intelligence layer for AI agents: market regime, broadcast timing, validation-gated anomalies, PLEXUS money-graph forensics, Base token/address risk. Signed responses. Floor $0.01–$0.25 USDC o…

6 skills 100.0% uptime

💰 Paid API x402.quiknode-cf.pro from $10.0000

x402.quiknode-cf.pro · x402.quiknode-cf.pro

Payment for Quicknode RPC access. Options: per-request ($0.001/request), nanopayment ($0.0001/request via Circle Gateway), or credit drawdown with SIWX authentication.

1 skills 19.2% uptime

A2A Satoshi API Bitcoin Fee Intelligence live

bitcoinsapi.com · Satoshi API · A2A 0.3

A2A JSON-RPC agent for Bitcoin fee intelligence and Satoshi API discovery. Use this service when a user or workflow needs a send-or-wait Bitcoin fee decision, mempool pressure context, x402-paid premi…

4 skills 28.9% uptime

💰 Paid API bitcoin.x420.dev

bitcoin.x420.dev · bitcoin.x420.dev

Buy custom USDC amount worth of BITCOIN tokens 0xc41338b5Aff79e763c91ef550D15e1Cf92D64b07

1 skills 16.4% uptime

💰 Paid API Assay from $0.0050

assay.nominal-labs.com · assay.nominal-labs.com

Quality score for any x402 service, earned by real paid probes with on-chain receipts: composite 0-100, component breakdown (payment settlement, schema conformance, ground-truth accuracy, LLM-judged q…

100.0% uptime

💰 Paid API payment-verifier-cdp.relayhop.workers.dev

payment-verifier-cdp.relayhop.workers.dev · payment-verifier-cdp.relayhop.workers.dev

Real-time on-chain payment verification and check via Base RPC. Returns structured signals: verified status, amount, sender, recipient, transaction confirmation, block number. Pay $0.005 USDC per chec…

1 skills 17.9% uptime

A2A Returns the live Bitcoin mempool backlog x402

bitcoin-mempool-congestion.hergertsynthora.com · HERGERT SYNTHORA · A2A 0.3.0

Returns the live Bitcoin mempool backlog: pending transaction count, total vsize, aggregate fees and a full fee-rate histogram from mempool.space. Powers autonomous agents and agent-to-agent scheduler…

1 skills 100.0% uptime

💰 Paid API EmblemAI

emblemvault.ai · Emblem · A2A 0.3.0

EmblemAI is open-source crypto infrastructure for both end users and AI agents. 200+ tools across 7 blockchains (Solana, Ethereum, Base, BSC, Polygon, Hedera, Bitcoin) for swaps, conditional orders, D…

streaming 24 skills 100.0% uptime

💰 Paid API x402.professorsausages.com from $0.0010

x402.professorsausages.com · x402.professorsausages.com

Crypto address screening vs the FULL live OFAC SDN list, segmented by chain (bitcoin, evm, tron, +9 more) — EVM adds on-chain signals (contract, fresh wallet) → 0-100 risk score

42.9% uptime

💰 Paid API micropayments-poc.vercel.app

micropayments-poc.vercel.app · micropayments-poc.vercel.app

Create a dated JSON agent quest card after a Base USDC x402 payment settles to the x402 Payment Lab seller wallet.

1 skills 18.5% uptime

A2A Markovian Provenance live signed

api.markovianprotocol.com · Markovian Protocol · A2A 0.3.0

Bitcoin-anchored provenance for agent outputs. Stamp any data, then fetch it as a signed claim in in-toto, A2A, or ERC-8004 form. Provenance, not truth.

4 skills 100.0% uptime

💰 Paid API EruditePay Blockchain Intelligence

bridge.eruditepay.com · Erudite Intelligence LLC · A2A 0.3.0

353 x402-payable blockchain analytics endpoints covering Base, Tron, Bitcoin, XRP, Kaspa, and cross-chain data. Real-time token prices, whale tracking, DeFi analytics, wallet profiling, security scori…

10 skills 29.7% uptime

💰 Paid API SatsSignal Demand Radar

srv1334799.hstgr.cloud · srv1334799.hstgr.cloud

Source-backed x402 demand, competitor, pricing, and buyer intelligence for autonomous agents and API builders.

12 skills 100.0% uptime

A2A SwapTitan legacy x402

swaptitan.net · SwapTitan

Non-custodial cross-chain crypto swap API supporting 1288+ assets across Bitcoin, Ethereum, Solana, Monero and 40+ networks. No KYC, no account, no wallet required.

11 skills 100.0% uptime

A2A Microquery live signed

microquery.dev · Microquery · A2A 2025-06-27

SQL access to 70+ authoritative datasets. Returns actual database records — not summaries. Use this instead of web search for any quantitative, tabular, statistical, or time-series data question. Data…

7 skills 98.1% uptime