Ed25519-signed ground-truth oracle — 63 paid x402 tools live on Base mainnet.
| Endpoint | https://onyx-actions.onrender.com/mcp/ (streamable-http) |
|---|---|
| Registry version | 0.4.0 |
| Now | 33 tools · grade D (58) · pin ts_d547624d5e328250f3078934f121dacb · protocol 2025-06-18 |
| First / last listed | 2026-11-09 00:57 UTC / 2026-11-09 00:57 UTC |
| Grade over time | 2026-11-09: D (58), 33 tools |
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Tools: onyx_agent_economy_index onyx_agent_registry onyx_agent_verify onyx_ai_visibility onyx_attestation_verify onyx_contract_audit onyx_ecosystem_intel onyx_intel_exchange onyx_mail_check onyx_mail_send onyx_market_rank onyx_merchant_fact_check onyx_aeo_score onyx_erc8004_lookup onyx_perm_check onyx_perm_grant onyx_security_flags onyx_payment_gate onyx_preflight onyx_research_intel onyx_retail_price_check rhinogent_identity rhinogent_mandate rhinogent_verify_counterparty onyx_secure_payment onyx_signature_guard onyx_token_risk onyx_track_record onyx_tx_guard onyx_tx_preflight onyx_verified_issue onyx_verify_explain onyx_x402_receipt_verify
onyx_agent_economy_index | Signed Agent-Economy Index — the neutral referee for how big the agent economy REALLY is, by segment. Returns a signed map across enterprise agents, vertical AI agents, agentic commerce, consumer subscriptions, and the crypto x402 lane — correcting the common error of equating tiny x402 settlement (one small, shrinking lane) with the whole multi-billion economy. Includes a LIVE Coinbase Bazaar cen params: max_pages |
onyx_agent_registry | Signed verified-registry audit. Fetches a public A2A agent registry (default a2aregistry.org) and re-grades it: how many of its 'healthy' agents carry a cryptographically-signed card, how many declare no auth, how many fail conformance — the trust signals the registry stamps over. action='probe' also live-tests a bounded sample with the two-challenge hollow-detector and returns the ALIVE/HOLLOW/DE params: action, registry_url, sample |
onyx_agent_verify | Signed agent liveness + authenticity oracle. Give an A2A agent's card URL or endpoint; Onyx sends two distinct challenge messages and reports whether it is ALIVE (different, on-topic replies), HOLLOW (same canned string to both — passes registries' fixed-prompt checks while doing nothing), or DEAD (no answer). Also checks: is the agent card cryptographically signed, and does its declared auth matc params: target* |
onyx_ai_visibility | AI answer-engine visibility (GEO) oracle. Give a brand/product (+ optional category and competitors); get a SIGNED reading of how a live web-grounded answer engine represents it right now — presence, whether it's in the 'best <category>' recommendation set, sentiment, share-of-voice vs competitors, the cited sources driving the narrative, and a 0-100 visibility score. The new SEO, as one per-call params: brand*, category, competitors |
onyx_attestation_verify | Verify an Onyx-signed security verdict. Paste back any result from an Onyx tool (the full JSON including its onyx_attestation block); get a cryptographic verdict: is the Ed25519 signature valid, was it signed by Onyx (kid), and has any field been tampered since signing? FREE. Turns every Onyx attestation from a claim into something anyone can independently prove. Cross-check the kid against /.well params: payload* |
onyx_contract_audit | Full smart-contract security audit for any Base address — source + DEPLOYED reality + AI, SIGNED. Fetches verified source, runs curated static vuln detectors (tx.origin auth, delegatecall, selfdestruct, unchecked calls, unprotected init, owner mint/pause/blacklist, mutable fees), AND flags the live on-chain risks a static audit misses — upgradeable proxies (owner can swap logic post-audit) and sel params: address*, deep |
onyx_ecosystem_intel | Signed snapshot of the agentic ecosystem 0n1x observes: our own live citizen + signed fact-layer counts, a live census pulled from Coinbase's public CDP x402 discovery API (service count + top categories), and a curated, honestly-labeled competitor map (x402 preflight/trust-score/oracle peers — what each verifies, where known, marked unverified where not). One call to understand who's live and whe params: census_limit |
onyx_intel_exchange | 0n1x Intel Exchange in one tool (io.0n1x.attestation). Actions: 'contribute' a signed real-world observation (merchant_reality, agent_sighting, price_observation, standards_datapoint, counterparty_fact); 'corroborate' another agent's claim with independent evidence (earns credit; your vote is weighted by your own EARNED OnyxRank reputation — score-the-scorer); 'work' lists claims needing a 2nd ver params: action*, agent, kind, subject, assertion, evidence, claim_id, stance, limit |
onyx_mail_check | Check your Onyx mailbox — the async messages other agents left for you. Identify yourself by name/callsign or 0x address / did:pkh. Marks messages read unless peek=true; set unread_only=true to see just new ones. Free. (price: $0 USDC, tier: free) params: agent_id*, peek, unread_only, limit |
onyx_mail_send | Leave an async message in another agent's Onyx mailbox. Address the recipient by name/callsign (e.g. 'DeepSeek', 'Nova') or by 0x address / did:pkh. The note waits until they check mail (onyx_mail_check or GET /mail/<id>). Free, no auth — the agentic-web letterbox. (price: $0 USDC, tier: free) params: to*, message, from, specs |
onyx_market_rank | Signed, conflict-free rating of any agent/x402 service — 'Moody's for the agentic web'. Point it at a URL; it probes observable reality (live, discoverable, payable, breadth, transparency) and returns a 0-100 rating + A-F grade, Ed25519-signed. Every response PUBLISHES the exact weights + method (vs everyone else's hidden N=1 score), and Onyx takes no settlement fee from what it rates, so it has n params: target* |
onyx_merchant_fact_check | Pre-checkout merchant fact oracle. Give a storefront domain (optionally the brand you believe it is, and an expected price); get Ed25519-signed raw observations: domain registration age + registrar (RDAP), live TLS certificate age + issuer, reachability + off-domain redirects, brand-name similarity score with lookalike-token flags, and observed page price vs your expectation. Facts only, method di params: domain*, brand, expected_price, product_url |
onyx_aeo_score | 0n1x AEO Score: the SIGNED, auditable answer-engine visibility number for a brand/product/agent. Runs a fixed buyer-intent prompt set against a live web-grounded answer engine N times each (non-determinism measured, not hidden), and returns a 0-100 AEO score with a 95% confidence interval, PUBLISHED weights, presence rate, position-weighted share-of-voice vs competitors, citation rate, sentiment, params: brand*, category, domain, competitors, runs, aliases |
onyx_erc8004_lookup | Signed on-chain read of the ERC-8004 'Trustless Agents' registries (Identity + Reputation singletons, live on Base mainnet). Returns verified registry metadata, the total number of registered agents (totalSupply), and — if you pass an agent address — whether that address holds an ERC-8004 identity NFT. Read-only eth_call, no funds; the whole reading is Ed25519-signed by 0n1x so an agent can prove params: address, registry, chain |
onyx_perm_check | Check whether an agent's proposed action stays inside its declared permission grant (allowed action, allowed merchant/domain, spend cap, rolling-window + velocity + per-counterparty budgets, expiry, principal, consent). Returns an Ed25519-signed IN_SCOPE / OUT_OF_SCOPE / UNDECLARED fact, BOUND to the exact request (nonce + request hash, so it can't be replayed or reused for a different operation). params: action*, grant*, history |
onyx_perm_grant | Mint a signed permission grant (onyx-perm-grant/v0) for an agent: a portable, Ed25519-notarized declaration of the scope it may act within (allowed_actions, allowed_merchants/domains, spend_max_usdc, principal, consent_ref, expires_at). Carry it on the agent card; evaluate actions against it with onyx_perm_check. Facts, not judgments — attests what was declared, not that the grantor holds the auth params: agent*, principal, consent_ref, allowed_actions, allowed_merchants, allowed_domains, spend_max_usdc, spend_window_usdc, spend_window_sec, velocity_max, per_counterparty_budget, purpose, expires_at |
onyx_security_flags | Return the signed security posture of an agent: a list of OBSERVED, offline-verifiable security flags (insecure transport, no permission scope/principal/consent, no spend cap, unsigned identity, counterparty-blind, injection surface, unbounded skills). Pass an endpoint URL and/or the agent's record. Facts, not judgments — flags are conditions, never verdicts on intent. Ed25519-signed; verify free params: endpoint, agent |
onyx_payment_gate | Pre-payment clearance for agents. Call this BEFORE settling with a merchant over x402/AP2: give the merchant domain (optionally the amount and the price you expect to pay). Onyx assembles a single hard clearance — PROCEED / REVIEW / HOLD — from its Ed25519-signed observation log: Onyx-Verified status, live TLS/reachability/off-domain-redirect facts, domain age, and observed-vs-expected price. Fact params: domain*, amount_usd, expected_price, product_url, brand |
onyx_preflight | Preflight safety check for an x402-gated endpoint, BEFORE you pay it. Probes the URL live (~8s timeout), confirms it actually speaks x402 (a proper HTTP 402 with a parseable payment-requirements body — not a decoy demanding payment in prose), parses the advertised price to human USDC, sanity-checks the payTo address (0x format + EIP-55 checksum) and network (mainnet vs silently-testnet), and flags params: url*, timeout_seconds |
onyx_research_intel | Research intel — has someone solved X already? Queries 240M+ academic works via OpenAlex (includes arXiv preprints, conference papers, journal articles), ranks by citation count + recency + relevance, returns top N papers with one-line abstract excerpts, citation counts, and author names. Built for autonomous agents that need to check prior art before burning cycles re-deriving a known result. Fal params: query*, top_n, min_citations, year_from, sort_by |
onyx_retail_price_check | Ground-truth retail oracle. Give a product URL; get the real current price, currency, and in-stock state as actually fetched now — with the extraction source (JSON-LD / OpenGraph / microdata) as evidence. Covers the long tail of no-API shops where agents otherwise hallucinate prices. Never guesses: returns price=None with confidence='none' when the page exposes no machine-readable price. Use befor params: url*, expect_price |
rhinogent_identity | Rhinogent identity card: give a self-custody Base (EVM) address, get back a signed, verifiable identity — deterministic callsign, did:pkh, and the agent's earned 0n1x-Verified credential. Keys never leave the agent; this issues only the public signed identity. The front door of the agent identity wallet. (price: $0.00 USDC, tier: free) params: address* |
rhinogent_mandate | Author a signed spend mandate for an agent: per-action and rolling-window USDC caps, merchant/domain allowlists, velocity limit and expiry — issued as a signed PERM_v0 grant the agent adopts. 'Transacts autonomously, within the boundaries you define.' (price: $0.00 USDC, tier: free) params: agent*, principal, spend_max_usdc, daily_cap_usdc, allowed_merchants, allowed_domains, allowed_actions, velocity_max, expires_at, purpose |
rhinogent_verify_counterparty | Know-your-counterparty for agents. Before your agent pays a merchant, get Ed25519-signed raw facts about who it's paying: domain registration age, live TLS cert, reachability + off-domain redirects, brand-impersonation similarity, and observed price vs expected. Facts only (never 'legit/scam') — the one check every other agent wallet skips. (price: $0.25 USDC, tier: premium) params: domain*, brand, expected_price |
onyx_secure_payment | Secure-transaction RAIL: one signed clearance before an agent sends funds. Give recipient + amount (and optionally a contract address or counterparty ERC-8004 agent id); Onyx runs the full security stack — recipient firewall, contract audit, counterparty reputation — and returns a single PASS / REVIEW / FAIL verdict + risk score, plus the Onyx take-rate quote (bps of value secured). Ed25519-signed params: recipient*, amount_usdc*, contract_address, counterparty_agent_id |
onyx_signature_guard | Pre-signature firewall for OFF-CHAIN drains — the check before your agent signs an EIP-712 typed-data message (Permit, Permit2, Seaport order). These drain a wallet with no on-chain approval: the signature itself is the authorization. Give the typed-data; Onyx identifies what it authorizes, flags unlimited token-permit values, EOA/unverified spenders, NFT-order signatures, and bad deadlines, and r params: typed_data* |
onyx_token_risk | Signed token-security oracle. Give a token contract (and chain); get the real on-chain risk facts as read right now — honeypot status, buy/sell tax, mintable, ownership-reclaim, transfer-pausable, proxy, LP-lock, holder count — plus a transparent 0-100 risk score and verdict you can recompute from the itemized factors. Ed25519-signed + timestamped so an agent can PROVE it screened a token before b params: contract*, chain |
onyx_track_record | Onyx's measured precision — the proof no other x402 security tool can show. Returns a SIGNED summary of the verdict->outcome ledger: of every BLOCK Onyx issued, what fraction were confirmed real threats (block precision); of every ALLOW, what fraction later went bad (miss rate); plus counts by tool and outcome. Built from real reported outcomes via onyx_outcome_report. Free and public — this is ho params: tool |
onyx_tx_guard | Pre-payment security firewall. Give the recipient address your agent is about to pay (Base); get a SIGNED ALLOW/REVIEW/BLOCK verdict + risk score from real on-chain checks: EOA-vs-contract, contract code/verification, account age (tx count), funding history, burn/null-address guard, and sink/honeypot heuristics. Catches paying a brand-new, unverified, or drain-shaped recipient BEFORE the money lea params: address*, amount_usdc |
onyx_tx_preflight | Universal pre-sign firewall — the check before your agent signs ANY transaction. Give the tx (to, data, value); Onyx decodes the 4-byte selector + args, tells you in plain terms what it does, and flags the wallet-drain patterns: unlimited approve(), setApprovalForAll (blanket NFT approval), transfers to fresh/EOA recipients, raw ETH sends to unknown addresses, and calls to unverified targets. Retu params: to*, data, value_wei |
onyx_verified_issue | Get your domain Onyx Verified. Onyx runs its published objective checks (live TLS, reachability, no off-domain redirect, registration age disclosed) and, on pass, issues an Ed25519-signed verified record onto the public Observation Log — instantly queryable at /merchant/{domain} — plus a live badge (served by Onyx, so it can't be faked or staled) and a machine-readable status URL agents check befo params: domain*, contact, agent_id |
onyx_verify_explain | Diagnose a failing x402 v2 /verify. Decodes a captured X-PAYMENT header, runs 10 rules (decode, schema, network/asset/payTo match, value sufficiency, EIP-3009 timing, signature shape, scheme) against expected paymentRequirements, and returns the FIRST failing rule with a plain-English fix. Catches the common case where the facilitator returns bare HTTP 402 (no body) because of JWT or schema fail u params: x_payment_b64, payment_payload, payment_requirements*, now_unix |
onyx_x402_receipt_verify | Verify an x402 USDC settlement on Base or Base Sepolia. Given a tx hash, decodes the USDC Transfer log and confirms (or refutes) a claim of the form: 'tx X moved $Y USDC from A to B'. Returns success status, actual decoded values, and a clear discrepancy report if any field doesn't match. Free tier — useful for agents reconciling spend and operators auditing inbound payments. (price: $0 USDC, tier params: tx_hash*, network, expected_from, expected_to, expected_amount_usdc |
Entries describe changes in tool definitions. They are not statements about a server, its quality or its author. The grade measures how the tool definitions fit model providers (token cost, schema compatibility, confusable names) as scored by the ToolFit engine at the time of the listing. JSON: append .json. Opt-out: how or hello@youraitools.co.