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How to verify an x402 payment actually settled on-chain
John O'Malley Jr
John O'Malley Jr
John O'Malley Jr
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Oct 24
How to verify an x402 payment actually settled on-chain
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x402
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web3
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api
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payments
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5 min read
48 hours later: our first external payer was an inspector
Quincy Goertz-Brown
Quincy Goertz-Brown
Quincy Goertz-Brown
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Oct 24
48 hours later: our first external payer was an inspector
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x402
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aiagents
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web3
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buildinpublic
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4 min read
How an agent finds a paid endpoint: .well-known/x402.json, llms.txt and an MCP server card
Dutiful
Dutiful
Dutiful
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Oct 24
How an agent finds a paid endpoint: .well-known/x402.json, llms.txt and an MCP server card
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x402
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agents
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api
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ai
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3 min read
Four x402 services, fifteen paid routes — and the cataloging mechanics nobody documents
Quincy Goertz-Brown
Quincy Goertz-Brown
Quincy Goertz-Brown
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Oct 23
Four x402 services, fifteen paid routes — and the cataloging mechanics nobody documents
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x402
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ai
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web3
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python
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1
 comment
3 min read
How an agent pays for and reads a company check over x402
Dutiful
Dutiful
Dutiful
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Oct 23
How an agent pays for and reads a company check over x402
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x402
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agents
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api
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ai
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4 min read
I Built a Pay-Per-Call API Where the First Call Costs Nothing
Redman WorkflowAlpha
Redman WorkflowAlpha
Redman WorkflowAlpha
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Oct 23
I Built a Pay-Per-Call API Where the First Call Costs Nothing
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x402
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ai
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micropayments
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api
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3 min read
Check a payTo before your agent pays it: a $0.01 x402 endpoint for Base. HelpUs♥
AlbertBalestrini
AlbertBalestrini
AlbertBalestrini
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Oct 23
Check a payTo before your agent pays it: a $0.01 x402 endpoint for Base. HelpUs♥
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ai
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webdev
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blockchain
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x402
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2 min read
Your 402 response says two things. Which one does the client read?
Kaven C
Kaven C
Kaven C
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Oct 23
Your 402 response says two things. Which one does the client read?
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x402
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agents
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api
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webdev
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3 min read
The data nobody sells: why I started taking a daily snapshot of 211,243 companies
Yoon
Yoon
Yoon
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Oct 23
The data nobody sells: why I started taking a daily snapshot of 211,243 companies
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ai
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webdev
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api
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x402
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4 min read
Can a Malicious API Drain an AI Agent's Wallet With x402? 25 Vulnerabilities, 3 Critical
ScriptMasterLabs
ScriptMasterLabs
ScriptMasterLabs
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Oct 23
Can a Malicious API Drain an AI Agent's Wallet With x402? 25 Vulnerabilities, 3 Critical
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x402
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aiagents
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security
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mcp
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 comment
3 min read
We measured 22,013 x402 endpoints: the catalogue is fresher than we thought, but it rarely tells you what you'll get
Conclave x402 Research
Conclave x402 Research
Conclave x402 Research
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Oct 21
We measured 22,013 x402 endpoints: the catalogue is fresher than we thought, but it rarely tells you what you'll get
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x402
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api
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webdev
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ai
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5 min read
I audited 240 entries of the 402 Index directory: healthy services quote a price, 8% publish one, and the priced row I could check understates by 2x
yagato
yagato
yagato
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Oct 21
I audited 240 entries of the 402 Index directory: healthy services quote a price, 8% publish one, and the priced row I could check understates by 2x
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x402
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payments
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webdev
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security
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3 min read
How to Verify Your x402 Endpoint Before You Ship It
TerraFirma Studio
TerraFirma Studio
TerraFirma Studio
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Oct 21
How to Verify Your x402 Endpoint Before You Ship It
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x402
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payments
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api
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5 min read
Trust teardown: what a first-time visitor cannot learn on a Solana staking landing page
yagato
yagato
yagato
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Oct 21
Trust teardown: what a first-time visitor cannot learn on a Solana staking landing page
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webdev
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security
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solana
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x402
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3 min read
State of x402 on Base: a data snapshot (October 2026)
PUYOK
PUYOK
PUYOK
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Oct 21
State of x402 on Base: a data snapshot (October 2026)
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x402
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base
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ai
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agents
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5 min read
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