EVERY CAPABILITY
All capabilities
2092 capabilities on 12 shelves · showing 1393–1440
Code 22 · 17 on this page
Shadcn component code, after payment
Found by us · x402.creative-tim.com
Code
Gives you the code for a UI component after payment.
Deterministic JSON validation and repair
Found by us · agent.atinamos.co.uk
Code
Validates and conservatively repairs broken JSON from an AI agent's output.
Number base converter
Found by us · agent402.tools
Code
Converts an integer between number bases, like binary and hex.
HMAC signature generator
Found by us · agent402.tools
Code
Computes an HMAC signature of a message with a shared key.
CRC-32 checksum
Found by us · agent402.tools
Code
Computes the CRC-32 checksum of a text string, in hex.
JSON Schema inference
Found by us · agent402.tools
Code
Infers a draft-07 JSON Schema from one or more sample documents.
Semver parser and comparator
Found by us · agent402.tools
Code
Parses a semantic version or compares two of them.
OpenAPI endpoint extractor
Found by us · agent402.tools
Code
Flattens an OpenAPI or Swagger spec into a simple list of callable endpoints.
Gzip decompression
Found by us · agent402.tools
Code
Decompresses a base64-encoded gzip payload back into its original content.
Crypto hash and ENS namehash calculator
Found by us · webtools402.176-109-107-191.sslip.io
Code
Computes keccak256, sha256, function selectors, event topics, or ENS namehashes.
GitHub repo deterministic facts
Found by us · verdoc-x402.verdoc-x402-worker.workers.dev
CodePractice
Gives deterministic facts about a public GitHub repo before you work in it.
OpenAPI payload validator
Found by us · agent402.tools
Code
Validates a JSON payload against an OpenAPI request or response schema.
Solidity contract pattern scan
Found by us · agent402.tools
Code
Flags risky patterns in Solidity smart-contract source code.
JSON repair for broken model output
Found by us · agent-data-fixer-production.up.railway.app
CodePractice
This endpoint fixes malformed JSON text, like output from a language model or tool that did not come out valid. You send it a text string, and it returns the parsed value, the repaired JSON text, and a flag saying whether anything changed. It uses fixed CPU rules, not guessing, but the seller warns repair may change meaning so you should check the result. It is for developers whose pipelines break on bad JSON from models or tools.
Compatibility witness for a schema change
Found by us · witness-edge-phase-c-test.witness-test.workers.dev
CodePractice
Before a change to a JSON Schema or an MCP interface is merged or deployed, this looks for a concrete case the change would break, and revalidates that case independently before reporting it. It returns such a case when it finds one, and the seller is explicit that its UNKNOWN and NO_WITNESS_FOUND answers never mean the change is compatible. It is for an agent gating a merge on whether an interface still accepts what it used to.
Inspect a Base contract before using it
Found by us · agent-api-testnet.tim1712.workers.dev
CodePractice
Give it a smart-contract address on Base and it reads what is actually there: a hash and the size of the contract's bytecode, what a proxy contract points at when it uses the standard proxy slot, the token details when the contract is an ERC-20, and the block the chain has reached. It only reads, and the seller says it makes no claim about whether the contract is safe or legitimate.
Prepare ERC-8004 agent URI update transaction
Found by us · api.sandbox.brickken.com
CodePractice
This builds an unsigned transaction that publishes an agent's final ERC-8004 URI and profile metadata. ERC-8004 is a standard for on-chain agent identity, and the URI points to that agent's profile data. It returns the unsigned transaction, ready for someone to sign and send, and it is meant for developers or agents managing an on-chain agent identity.
Checks & verification 347 · 31 on this page
Finnish company registry lookup
Found by us · data.greeneris.io
Checks & verification
Gives you official Finnish company registration data by name or ID.
Base public RPC health map
Found by us · x402.dailyelo.com
Checks & verification
Tells you which Base public RPCs are serving a stale chain tip.
CSV data quality check
Found by us · grove.g-datalabs.com
Checks & verification
Checks a CSV for missing values, duplicates and schema problems.
Bulk HTTP status and redirect checker
Found by us · http-status-checker.underscoredone.com
Checks & verification
Checks up to 10 URLs and tells you if they're working, broken or redirecting.
Trusted agent ranking by capability
Found by us · agent-guild-5d5r.onrender.com
Checks & verification
Ranks which agents to hire for a capability, by trust evidence.
x402 endpoint trust probe
Found by us · deadchannel.vercel.app
Checks & verification
Checks whether an unfamiliar x402 endpoint is safe to pay.
Company legal entity ID (LEI) lookup
Found by us · lionx402.com
Checks & verification
Gives you a company's Legal Entity Identifier and registration status.
Bazaar listing stability triage
Found by us · api.oblique.markets
Checks & verification
Tells you whether a Bazaar listing is stable enough to depend on.
X post visibility preflight check
Found by us · kevinhoff.com
Checks & verification
Checks a draft X post against X's own ranking code before you post it.
Independent URL fetch and timestamp certificate
Found by us · witnessd.vip
Checks & verification
Independently fetches, hashes and timestamps a URL, with a signed certificate.
Solana settlement verification
Found by us · x402.nsgoods.org
Checks & verification
Confirms whether a Solana transaction actually credited an amount to a payee.
Single named compliance check
Found by us · 10x402.com
Checks & verification
Runs one named compliance check against a live endpoint you choose.
TLS/SSL certificate check
Found by us · api.trustsource.cc
Checks & verification
Checks whether a domain's TLS certificate is valid and not expiring soon.
Payment authorization decision
Found by us · api.safe4.ai
Checks & verification
Gives you a payment authorization decision, though details aren't confirmed.
x402 readiness and trust evidence check
Found by us · proof.platoskallipolis.com
Checks & verification
Checks a domain or Base address's public evidence before you trust or pay it.
Fresh x402 origin compliance scan
Found by us · api.x402lint.dev
Checks & verification
Runs a fresh 25-check scan of an origin and grades it.
Package install safety check
Found by us · api.vrsai.tech
Checks & verification
Tells you whether an npm or PyPI package version is safe to install.
ERC-8004 agent identity lookup
Found by us · agent.memoryapi.org
Checks & verification
Gives you an ERC-8004 AI agent's registered identity on Base.
Demo payment-gated endpoint (mainnet)
Found by us · api-dev.agents.skillfulai.io
Checks & verification
Confirms your payment went through, on a demo mainnet endpoint.
URL content checksum verification
Found by us · scrapecheck.fly.dev
Checks & verification
Confirms a URL's exact bytes match a claimed SHA-256 checksum.
IP address fraud reputation check
Found by us · api.agentstools.dev
Checks & verification
Gives you a public IP address's fraud risk score and reputation flags.
x402 payment channel heartbeat
Found by us · x402tap.com
Checks & verification
Gives you a heartbeat response billed through a batch-settlement payment channel.
Signed onchain wallet condition attestation
Found by us · api.insumermodel.com
Checks & verification
Gives you a signed yes-or-no proof of onchain wallet conditions, not raw balances.
Minneapolis rental license check
Found by us · x402-mcp.onrender.com
Checks & verification
Tells you whether a Minneapolis rental property is licensed and compliant.
x402 payment flow test ping
Found by us · x402-gateway.ai
Checks & verification
Confirms your x402 payment setup works, and returns pong.
Reputation score for a Base wallet
Found by us · graphadvocate.com
Checks & verification
Gives you a 0-100 reputation score for a Base wallet, to judge a peer agent.
Live/dead check for a job or product page
Found by us · livecheck.fly.dev
Checks & verification
Tells you whether a job posting or product page is still live before you scrape it.
EU VAT number validation
Found by us · lionx402.com
Checks & verification
Checks whether an EU VAT or tax ID is valid, via VIES.
AI agent-accessibility check for a URL
Found by us · api.x402dataapi.com
Checks & verification
Checks whether a public URL is ready for AI agents and crawlers.
Agent-readiness score for a website
Found by us · x402.asterpay.io
Checks & verification
Scores how ready a public website is for AI agents to use.
IP geo, ISP, and VPN detection
Found by us · archtools.dev
Checks & verification
Tells you an IP address's location, ISP, and whether it's a VPN or proxy.