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$ man x-username

/x-username

agentutility / web-probe / x-username
PRICE / CALL
$0.005
USDC · base mainnet · scheme: exact
METHOD
POST
CLUSTER
webprobe
CATEGORY
uncategorized
STATUS
live
NAME
x-username x username lookup / twitter username lookup / handle resolver / public profile lookup / follower count api
SYNOPSIS
POST https://x402.agentutility.ai/x-username
     Content-Type: application/json
     X-PAYMENT:    <signed-transferWithAuthorization>

     { ... }
↳ first call → 402 Payment Required. Sign USDCtransferWithAuthorization, retry with theX-PAYMENT header.
DESCRIPTION

X username lookup / Twitter username lookup / handle resolver / public profile lookup / follower count API. Read-only X API v2 user-by-username wrapper. Accepts a handle with or without @ and returns id, username, display name, bio, verification fields, created_at, followers, following, tweet count, and listed count. Requires X_BEARER_TOKEN; no posting, replying, liking, following, or account mutation.

INPUTrequest schema
propertytypedescriptionreq?
usernamestringX/Twitter handle, with or without @, e.g. 'bankrbot'.required
OUTPUTresponse shape
fieldtypedescription
modestring
userstring
sourcestring
EXAMPLEStwo ways to call
EXAMPLE 1 · curl
curl -X POST https://x402.agentutility.ai/x-username \
  -H 'Content-Type: application/json' \
  -d '{ }'
first response = 402 Payment Required with payment requirements; sign + retry with X-PAYMENT.
EXAMPLE 2 · mcp
# Install the MCP package for this endpoint's cluster
npx -y @agentutility/mcp-<cluster>

# Required: EVM private key with USDC on Base
export X402_PRIVATE_KEY=0x...

# Then call the x-username tool from your MCP-aware agent.
MCP server handles payment automatically — your coding agent just calls the tool by name.
METADATA
tags
web-probexusernamex-username
methods
POST
cluster
webprobe
price
$0.005 USDC per call
ADJACENTother endpoints in webprobe
endpointdescriptionprice
brand-name-scoreBrand name scorer / startup name evaluator / company name quality check / product naming validator.$0.005
crypto-newsCrypto news API / cryptocurrency headlines / bitcoin news / ethereum news / DeFi news / stablecoin news / market news feed.$0.005
disposable-email-checkDisposable email detector / temp-mail / throwaway email / fake email / 10minutemail filter / Mailinator + Guerrilla Mail + Yopmail blockl…$0.005
domain-availabilityDomain availability / RDAP lookup / WHOIS replacement / domain registration checker / expiry date lookup.$0.005
emailEmail validation API / email deliverability check / email verifier.$0.005
email-deliverabilityEmail deliverability API / email deliverability score / inbox readiness domain check.$0.005
email-deliverability-checkEmail deliverability verification / email validation / email verifier / email checker / MX lookup / disposable email risk / role-account…$0.005
email-deliverability-scoreEmail deliverability score API / inbox readiness score / email health check.$0.005
SEE ALSO
agentutility · webprobe · x402 · mcp · llms.txt · registry.json · bazaar.x402.org