Plexa /v1/pretrade/check — pre-trade token safety check on Base: can you still sell this token? avoid fires only on a trap proven on-chain now: no pool to exit into, an exit pot under 5% of your size, or the trading gate off (the honeypot shape). A drained pot is what a rug leaves behind — measured, not predicted. clear = no provable trap, NOT safe. risk_profile: token age, holder concentration, liquidity, transfer limits. Not financial advice.

Generate placeholder text by paragraphs, sentences, or words.

Stateless WebAuthn/passkey verification: validate a registration (attestationObject + clientDataJSON) or assertion (authenticatorData + clientDataJSON + signature) against a caller-supplied challenge, origin and rpId — pure-python CBOR/COSE parsing, Ed25519 and ES256 signature checks, UP/UV flags, signCount, credential public key echo, per-check verdict.

Screen an ERC-8004 (Trustless Agents) agent identity: resolve tokenURI on the on-chain Identity Registry, fetch and parse the agentURI (ipfs/https/data:), live-probe its declared service endpoints (bounded), sample the reputation registry, and return a signed registered/reachable/grounded verdict. $0.01.

WebAuthn attestation trust check: parse attestationObject fmt/attStmt, verify packed and fido-u2f self-attestation signatures, verify x5c leaf certificate signatures when the crypto backend is present, echo AAGUID and credential material, and state the trust level (FIDO MDS not configured; never overstated).

Generate UUID v4/v5/v7, ULID, or NanoID (single or batch), or parse/validate an existing id and extract its embedded timestamp.

A2A/ACP/UCP/AP2/x402 discovery cross-check: fetch every well-known surface, extract the claimed endpoint URLs + capabilities, PROBE each claimed endpoint (payment endpoints must answer 402, not 200), and report per-surface claim-vs-runtime mismatches with a signed verdict. $0.01.

Build signed deterministic payout instruction rows for bounty winners.

Current temperature, wind, humidity, and conditions for any lat/lon (Open-Meteo, keyless).

worldchain tx lookup (0x..64hex): eth_getTransactionByHash + receipt; tx_not_found is a valid $0.01 verdict.

worldchain address snapshot (0x..40hex): balance_wei, nonce, is_contract on a chainId-verified RPC.

Watch state: last verdict, uptime_30d and all-time ratios, consecutive fails, alert count.

Generate v4 (random) or v5 (name-based) UUIDs in a batch; optional uppercase / no-hyphens.

Generate placeholder text by paragraphs, sentences, or words.

Daily high/low, precipitation, and conditions for the next N days at any lat/lon (Open-Meteo).

Neutral escrow-condition oracle: from a deal + evidence emit a signed release|refund|extend|insufficient_evidence verdict. Never custodies funds.

Convert length, mass, volume, data-size, time, speed, or temperature between units.

Extract one or many values from a JSON blob by dot/bracket path (e.g. items[2].name, meta.total). Pull just the fields you need instead of shipping the whole object.

Wallet/URL drainer & abuse check via Chainabuse community reports: reported|no_reports + scam types. Signed.

Recompute per-step catalog price for an artifact (model, usage dimensions, service tier, cache read/write, context thresholds), compare with recorded cost, flag overbilling variance and unpriced steps, with per-provider totals.