OpenSea Mobile is live: Trade everything, together.
Get the app
Home
Collections
Tokens
Perps
Trading Cards
FeedActivity
Drops
Rewards
Tools
Beta
Studio
Sign in
Aggregating
Networks
Platform Terms
Wallet & Onramp Terms
Privacy Policy
Agent Tools
X402 Preflight

X402 Preflight

x402-preflight
By
0xef2c...1c75
NFT Gated
Live
Pricing
0.02USDC
X402 Preflight
X402 Preflight
By
0xef2c...1c75
NFT Gated
Live
Pricing
0.02USDC
Call this tool
Access
NFT Gated
Requires an NFT from this collection.
AXIOM Tool Pass
Floor price 
$3.18
0%
Preflight a public HTTPS endpoint before spending. Probes with GET or POST, detects 402/x402 payment requirements, summarizes networks, schemes, payTo recipients, USDC price hints, retryability, Tool Pass auth clues, latency, and evidence, then compares caller expectations (maxUsdc, network, payTo, resource/resourceHost/resourcePath) before any signer is invoked. Blocks localhost/private/IP-literal targets to avoid SSRF. Built for agents deciding whether and how to pay a Base x402 endpoint.
x402
base
payment
preflight
agent
safety
ParameterTypeDescription
url*
string
Public HTTPS endpoint URL to probe. Private hosts, localhost, and IP literals are rejected.
body
object
JSON body for POST probes. Do not include secrets; custom headers are intentionally not supported.
method
string
Probe method. POST sends the supplied JSON body; GET sends no body.
expected
object
Caller-side expectations to check before any signer is invoked. The tool compares live x402 requirements against maxUsdc, network, payTo, resource, resourceHost, and resourcePath and returns callerChecks.mayInvokeSigner.Fields: payTo, maxUsdc, network, resource, resourceHost, resourcePath
timeoutMs
integer
Probe timeout in milliseconds.
ParameterTypeDescription
ok*
boolean
url*
string
payTo*
string[]
method*
string
status*
integer
schemes*
string[]
evidence*
object
Fields: bodyJson, bodyBytes, headersSeen, responseStatus
networks*
string[]
warnings*
string[]
fetchedAt*
string
latencyMs*
integer
retryable*
boolean
contentType*
object
x402Version*
object
callerChecks*
object
Fields: note, verdict, expected, failures, warnings, mayInvokeSigner, matchingRequirementIndexes
cheapestUsdc*
object
requirements*
object[]
protocolChecks*
object
Strict x402 v2 wire-contract checks for the live 402 challenge before any signer retry.Fields: note, verdict, failures, strictV2, warnings, requiredBody, requiredHeaders, mayRetryWithPaymentSignature
paymentRequired*
boolean
requirementCount*
integer
acceptsToolPassAuth*
boolean
Tool ID
249
Chain
Base
Last Checked
Created
Updated
Onchain verification
Manifest hash doesn't match
Endpoint
https://www.clawbots.org/api/tools/x402-preflight
NFT Gated
No activity yet. Activity will appear here as the tool is used.
Cc0pedia
Cc0pediacc0.company
The agentic read API over cc0pedia — the largest machine-readable CC0 database (1,100+ entries: public-domain creators, collections, works). Pay $0.01 USDC per lookup; get ONE entry resolved from a free-text query: provenance, creator, license, on-chain pointers (collection contract addresses / chains / OpenSea), and the full CC0 body. Synchronous JSON, no polling. A miss returns 404 and the payment auto-cancels. Output license: CC0.
$0.01 USDC
0xba81...6ef5
BridgePilot Cross-Chain Route Quote
BridgePilot Cross-Chain Route Quotebridgepilot.onrender.com
Compares cross-chain transfer routes from LI.FI and Across across Ethereum, Base, Arbitrum, Optimism and Polygon, computes the net amount received in USD after fees and gas, filters unsafe or invalid quotes with deterministic checks and returns the best route with alternatives and reasons. Quote only and non-custodial. 0.01 USDC per call via x402.
$0.01 USDC
0x9371...7cd4
Monad Mogs Agent Lookupapi.monadmogs.xyz
Resolve a Monad Mog token into its ERC-8004 agent identity, ERC-8217 binding contract, AgentURI, and onchain controller context.
Free
siyabald
siyabald
Walcert Originswalcert.globalscoreagent.com
Issues an A–F Origins wallet-maturity certificate (source of funds) via Walcert hot-analysis. Paid with x402 USDC on Celo or Base; returns signed certificate with on-chain ERC-8004 anchor.
$0.05 USDC
0x475f...e124
Normies Paths
Normies Pathsnormiescredhub.vercel.app
Returns 3–5 Pulse-weighted ranked paths for any Normie agent. Call after Normies Cred Pulse. Public Pulse GET is enough to condition ranking when the caller cannot pass the gate. Designed for autonomous agent-to-agent and NFT-to-NFT decision making. Token-gated to Normie holders.
NFT Gated
SHISLER671
Mintlatch Drops (pay per call)
Mintlatch Drops (pay per call)api.mintlatch.xyz
Live and upcoming NFT drops on OpenSea across Ethereum, Robinhood Chain, Ink and Arc: mint stages with start/end times, prices and per-wallet limits, supply and minted so far. Also returns mint pace, owners, socials and the deployer's track record. Pay per call: $0.01 USDC on Base (x402), no pass needed.
$0.01 USDC
Mintlatch
Verify Toolagenttoolindex.xyz
Verifies any ERC-8257 tool. Given a chain_id and tool_id, it reads the tool's onchain registry config, confirms the manifest hash matches the hosted manifest, probes whether the tool's endpoint is live, decodes access predicate and x402 payment requirements, and returns a trust report with a callable verdict. A public-good verification primitive for agents vetting tools before they call them.
Free
0xa102...3495
Dental Market Positioning
Dental Market Positioningprovidersignal.com
Market Multiple Positioning for a US dental market: a Premium/Average/Discount band versus the national practice-sale benchmark, computed live from state dental board rosters, NPI/NPPES, Census demographics, and DSO-affiliation detection across 42 enriched states plus DC. Scope by state, optionally narrowed to a 3-digit ZIP prefix (metro grain). Returns the band, a 0-100 score, factor breakdown (DSO competition, demographics, scarcity, supply pressure), confidence, and the inputs used.
Paid
0x0294...95ea
Mfertown Mfergpt Swap
Mfertown Mfergpt Swapgame.mfergpt.lol
Build and report Base ETH to MFERGPT swap transactions for mfertown agents.
$0.00 USDC
0x3922...d523
SeaSignal — Collection Signal
SeaSignal — Collection Signalseasignals.xyz
Returns momentum, liquidity, and risk scores for any NFT collection in one call. Computes floor price, volume momentum (accelerating/steady/fading), order-book depth within 5% of floor, a 0–100 liquidity score, a 0–100 momentum score, risk flags (thin_bid_side, low_24h_volume, volume_drop), and a bullish/neutral/bearish signal with a plain-English summary. Free, no auth required.
Free
0xd046...dfe1
Sms Sendersms-sender.juanmaone.workers.dev
Send a real SMS text to any US phone number, delivered via Twilio in seconds. No Twilio account, no phone number provisioning, no monthly contract — pay $0.01 USDC per message over x402. Built-in abuse filtering keeps delivery reliable. Great for agents that need to notify, alert, or verify a human by text as part of an automated workflow.
$0.01 USDC
0xc28d...2005
Vibeify
Vibeifyvibe-o-matic.vercel.app
Render any image as a Good Vibes Club / Vibetown vinyl figurine. Send a photo and an optional free-text intent; receive a PNG with the scene, action, mood, and aspect ratio agentically chosen from a curated catalog of 1,008 valid combinations (6 scenes x 7 actions x 8 moods x 3 aspect ratios). Settles $0.69 USDC on Base via x402.
$0.69 USDC
0xc93c...ce22