{"id":541907,"name":"Meridian","description":"Pre-sign checks for agents: call Meridian before you sign. mio_dio_defi_risk_passport: a read-only x402 pay-per-call HTTP API. Public on-chain Aave, Lido, ERC-4626 vault, OFAC SDN exact-match, parameter-drift, and transaction-simulation cards. Never holds keys, does not sign, and does not move funds. Not an A2A JSON-RPC task server.","card_url":"https://meridian.miodiollc.com/.well-known/agent-card.json","endpoint":"https://meridian.miodiollc.com","protocol_version":"1.0","first_seen":"2026-10-17T18:21:11.369411+00:00","last_verified":"2026-11-04T09:53:34.521356+00:00","card":{"name":"Meridian","skills":[{"id":"risk_passport","name":"Aave v3 risk card","tags":["defi","risk","aave","x402"],"examples":["GET /v1/risk/0x0000000000000000000000000000000000000001"],"description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian Aave v3 risk card for an EVM address: health factor, collateral, debt and liquidation distance (~$0.005 USDC Exact on Base). Errors: 400 invalid_address or unsupported_chain (chain must be base or ethereum), 402 payment required, failed upstream reads return 200 with status partial/error (unexpected 5xx is not charged). MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms"},{"id":"lido_exit_risk","name":"Lido exit-risk card","tags":["defi","lido","lst","x402"],"examples":["GET /v1/lido/exit-risk?amount=32"],"description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian Lido exit-risk card: stETH/ETH Curve peg, withdrawal-queue ETA and exit liquidity for a stETH amount (~$0.005 USDC Exact on Base). Errors: 400 amount_required or invalid_amount, 402 payment required, failed upstream reads return 200 with status partial/error (unexpected 5xx is not charged). MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms"},{"id":"vault_risk","name":"ERC-4626 vault risk card","tags":["defi","erc4626","vault","x402"],"examples":["GET /v1/vault/0xc1256Ae5FF1cf2719D4937adb3bbCCab2E00A2Ca"],"description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian ERC-4626 vault risk card: share price, drawdown, APY lookback and idle cash for one vault (~$0.005 USDC Exact on Base). Errors: 400 invalid_address, unsupported_chain or invalid_amount, 402 payment required, failed upstream reads return 200 with status partial/error (unexpected 5xx is not charged). MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms"},{"id":"deep_passport","name":"Deep passport","tags":["defi","risk","passport","x402"],"examples":["GET /v1/passport/0x0000000000000000000000000000000000000001"],"description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian deep passport: one decision card joining Aave v3, Lido exit and optional ERC-4626 vault reads for an EVM address (~$0.02 USDC Exact on Base). Errors: 400 invalid_address, unsupported_chain or invalid_amount, 402 payment required, failed upstream reads return 200 with status partial/error (unexpected 5xx is not charged). MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms"},{"id":"sanctions_screen","name":"OFAC SDN screen","tags":["ofac","sdn","sanctions","x402"],"examples":["GET /v1/sanctions/0x0000000000000000000000000000000000000001"],"description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian OFAC SDN screen: exact match of one digital-currency address against public SDN Digital Currency Address entries (~$0.005 USDC Exact on Base). Informational only. Errors: 400 invalid_address or unsupported_chain, 402 payment required, unexpected 5xx is not charged. MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms"},{"id":"passport_sanctions","name":"Passport + SDN bundle","tags":["ofac","sdn","passport","x402"],"examples":["GET /v1/passport-sanctions/0x0000000000000000000000000000000000000001"],"description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian bundle: deep passport plus OFAC SDN exact-match screen for one EVM address (~$0.02 USDC Exact on Base). Informational only. Errors: 400 invalid_address, unsupported_chain or invalid_amount, 402 payment required, failed upstream reads return 200 with status partial/error (unexpected 5xx is not charged). MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms"},{"id":"sanctions_batch","name":"OFAC SDN batch screen","tags":["ofac","sdn","batch","x402"],"examples":["POST /v1/sanctions/batch"],"description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian OFAC SDN batch screen: exact match of 1-50 digital-currency addresses against public SDN Digital Currency Address entries (~$0.10 USDC Exact on Base). Informational only. Errors: 400 invalid_body, invalid_address or unsupported_chain, 402 payment required, unexpected 5xx is not charged. MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms"},{"id":"parameter_drift","name":"Parameter-drift check","tags":["defi","tx","drift","x402"],"examples":["POST /v1/drift"],"description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian parameter-drift check: diffs a declared intent against the exact unsigned tx or EIP-712 payload (~$0.005 USDC Exact on Base). Verdict match, drift or cannot_verify. Unknown calldata is cannot_verify, never match. A match is not a guarantee. Errors: 400 invalid_body or unsupported_chain, 402 payment required. MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms"},{"id":"transaction_simulate","name":"Transaction simulation","tags":["defi","tx","simulate","x402"],"examples":["POST /v1/simulate"],"description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian transaction simulation: dry-run of an unsigned tx against latest Base/Ethereum state (~$0.01 USDC Exact on Base). Returns success or revert, gas, balances, approvals and warnings. A simulation is a point-in-time dry run, not a guarantee. Never signs or moves funds. Errors: 400 invalid_body or unsupported_chain, 402 payment required. MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms"},{"id":"payment_check","name":"USDC payment check","tags":["defi","x402","payment"],"examples":["POST /v1/payment-check"],"description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian payment-check: on-chain read of a Base USDC Exact authorization or Transfer (~$0.005 USDC Exact). Reports nonce used, matching transfers in a ≤120 minute window, and confirmations. Informational. 503 and not settled if every read fails. Never signs or moves funds. Errors: 400 invalid_body, 402 payment required, 503 upstream_unavailable. MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms"}],"version":"0.8.0","provider":{"url":"https://meridian.miodiollc.com","organization":"MioDio LLC"},"description":"Pre-sign checks for agents: call Meridian before you sign. mio_dio_defi_risk_passport: a read-only x402 pay-per-call HTTP API. Public on-chain Aave, Lido, ERC-4626 vault, OFAC SDN exact-match, parameter-drift, and transaction-simulation cards. Never holds keys, does not sign, and does not move funds. Not an A2A JSON-RPC task server.","capabilities":{"streaming":false,"extensions":[{"uri":"https://meridian.miodiollc.com/.well-known/x402","required":false,"description":"x402 v2 resource-server catalog (atomic prices, Base USDC, payTo)."},{"uri":"https://meridian.miodiollc.com/openapi.json","required":false,"description":"OpenAPI 3.1 for paid and free routes."},{"uri":"https://meridian.miodiollc.com/llms.txt","required":false,"description":"Plain-text summary for LLM agents."},{"uri":"https://meridian.miodiollc.com/.well-known/meridian-receipt-keys.json","required":false,"description":"Ed25519 public keys for verifying Meridian-Receipt headers."},{"uri":"https://meridian.miodiollc.com/docs","required":false,"description":"Human-readable HTML docs."},{"uri":"https://meridian.miodiollc.com/v1/demo/drift","required":false,"description":"Free parameter-drift demo card (GET /v1/demo/drift)."},{"uri":"https://meridian.miodiollc.com/v1/demo/simulate","required":false,"description":"Free transaction-simulation demo card (GET /v1/demo/simulate)."}],"extendedAgentCard":false,"pushNotifications":false},"documentationUrl":"https://meridian.miodiollc.com/docs","defaultInputModes":["application/json"],"defaultOutputModes":["application/json"],"supportedInterfaces":[{"url":"https://meridian.miodiollc.com","protocolBinding":"HTTP+JSON","protocolVersion":"1.0"}]},"status":"verified","publisher_domain":"miodiollc.com","signature_status":"unsigned","signature_detail":"No card signature supplied","signature_key_url":null,"signature_checked_at":"2026-11-04T09:53:34.521356+00:00","domain_claimed_at":null,"domain_proof_checked_at":null,"source_name":"Publisher Agent Card","source_url":"https://meridian.miodiollc.com/.well-known/agent-card.json","last_check":{"checked_at":"2026-11-04T09:53:34.521356+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},"also_published_at":[{"card_url":"https://workers.miodiollc.com/.well-known/agent-card.json"}],"history_urls":["https://meridian.miodiollc.com/.well-known/agent-card.json","https://workers.miodiollc.com/.well-known/agent-card.json"],"skills":[{"skill_id":"risk_passport","name":"Aave v3 risk card","description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian Aave v3 risk card for an EVM address: health factor, collateral, debt and liquidation distance (~$0.005 USDC Exact on Base). Errors: 400 invalid_address or unsupported_chain (chain must be base or ethereum), 402 payment required, failed upstream reads return 200 with status partial/error (unexpected 5xx is not charged). MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms","tags":["defi","risk","aave","x402"],"quality_warning":false},{"skill_id":"deep_passport","name":"Deep passport","description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian deep passport: one decision card joining Aave v3, Lido exit and optional ERC-4626 vault reads for an EVM address (~$0.02 USDC Exact on Base). Errors: 400 invalid_address, unsupported_chain or invalid_amount, 402 payment required, failed upstream reads return 200 with status partial/error (unexpected 5xx is not charged). MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms","tags":["defi","risk","passport","x402"],"quality_warning":false},{"skill_id":"vault_risk","name":"ERC-4626 vault risk card","description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian ERC-4626 vault risk card: share price, drawdown, APY lookback and idle cash for one vault (~$0.005 USDC Exact on Base). Errors: 400 invalid_address, unsupported_chain or invalid_amount, 402 payment required, failed upstream reads return 200 with status partial/error (unexpected 5xx is not charged). MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms","tags":["defi","erc4626","vault","x402"],"quality_warning":false},{"skill_id":"lido_exit_risk","name":"Lido exit-risk card","description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian Lido exit-risk card: stETH/ETH Curve peg, withdrawal-queue ETA and exit liquidity for a stETH amount (~$0.005 USDC Exact on Base). Errors: 400 amount_required or invalid_amount, 402 payment required, failed upstream reads return 200 with status partial/error (unexpected 5xx is not charged). MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms","tags":["defi","lido","lst","x402"],"quality_warning":false},{"skill_id":"sanctions_batch","name":"OFAC SDN batch screen","description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian OFAC SDN batch screen: exact match of 1-50 digital-currency addresses against public SDN Digital Currency Address entries (~$0.10 USDC Exact on Base). Informational only. Errors: 400 invalid_body, invalid_address or unsupported_chain, 402 payment required, unexpected 5xx is not charged. MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms","tags":["ofac","sdn","batch","x402"],"quality_warning":false},{"skill_id":"sanctions_screen","name":"OFAC SDN screen","description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian OFAC SDN screen: exact match of one digital-currency address against public SDN Digital Currency Address entries (~$0.005 USDC Exact on Base). Informational only. Errors: 400 invalid_address or unsupported_chain, 402 payment required, unexpected 5xx is not charged. MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms","tags":["ofac","sdn","sanctions","x402"],"quality_warning":false},{"skill_id":"parameter_drift","name":"Parameter-drift check","description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian parameter-drift check: diffs a declared intent against the exact unsigned tx or EIP-712 payload (~$0.005 USDC Exact on Base). Verdict match, drift or cannot_verify. Unknown calldata is cannot_verify, never match. A match is not a guarantee. Errors: 400 invalid_body or unsupported_chain, 402 payment required. MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms","tags":["defi","tx","drift","x402"],"quality_warning":false},{"skill_id":"passport_sanctions","name":"Passport + SDN bundle","description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian bundle: deep passport plus OFAC SDN exact-match screen for one EVM address (~$0.02 USDC Exact on Base). Informational only. Errors: 400 invalid_address, unsupported_chain or invalid_amount, 402 payment required, failed upstream reads return 200 with status partial/error (unexpected 5xx is not charged). MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms","tags":["ofac","sdn","passport","x402"],"quality_warning":false},{"skill_id":"transaction_simulate","name":"Transaction simulation","description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian transaction simulation: dry-run of an unsigned tx against latest Base/Ethereum state (~$0.01 USDC Exact on Base). Returns success or revert, gas, balances, approvals and warnings. A simulation is a point-in-time dry run, not a guarantee. Never signs or moves funds. Errors: 400 invalid_body or unsupported_chain, 402 payment required. MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms","tags":["defi","tx","simulate","x402"],"quality_warning":false},{"skill_id":"payment_check","name":"USDC payment check","description":"Pre-sign check: agents call Meridian before they sign. MioDio Meridian payment-check: on-chain read of a Base USDC Exact authorization or Transfer (~$0.005 USDC Exact). Reports nonce used, matching transfers in a ≤120 minute window, and confirmations. Informational. 503 and not settled if every read fails. Never signs or moves funds. Errors: 400 invalid_body, 402 payment required, 503 upstream_unavailable. MioDio x402 DeFi. Terms: https://meridian.miodiollc.com/terms","tags":["defi","x402","payment"],"quality_warning":false}],"quality_flags":[],"check_history":{"checks":136,"passed":136},"recent_checks":[{"card_url":"https://meridian.miodiollc.com/.well-known/agent-card.json","checked_at":"2026-11-04T09:53:34.521356+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},{"card_url":"https://workers.miodiollc.com/.well-known/agent-card.json","checked_at":"2026-11-04T01:16:54.399573+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},{"card_url":"https://workers.miodiollc.com/.well-known/agent-card.json","checked_at":"2026-11-03T13:15:48.053403+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},{"card_url":"https://workers.miodiollc.com/.well-known/agent-card.json","checked_at":"2026-11-03T07:13:51.214241+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},{"card_url":"https://workers.miodiollc.com/.well-known/agent-card.json","checked_at":"2026-11-03T01:13:04.625247+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},{"card_url":"https://workers.miodiollc.com/.well-known/agent-card.json","checked_at":"2026-11-02T13:12:02.510010+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},{"card_url":"https://workers.miodiollc.com/.well-known/agent-card.json","checked_at":"2026-11-02T01:11:16.577851+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},{"card_url":"https://workers.miodiollc.com/.well-known/agent-card.json","checked_at":"2026-11-01T13:10:07.566219+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},{"card_url":"https://workers.miodiollc.com/.well-known/agent-card.json","checked_at":"2026-11-01T01:09:18.394050+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},{"card_url":"https://workers.miodiollc.com/.well-known/agent-card.json","checked_at":"2026-10-31T13:08:39.023689+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},{"card_url":"https://workers.miodiollc.com/.well-known/agent-card.json","checked_at":"2026-10-31T01:07:52.002853+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},{"card_url":"https://workers.miodiollc.com/.well-known/agent-card.json","checked_at":"2026-10-30T13:06:59.278100+00:00","success":true,"http_status":200,"detail":"Agent Card validated"}],"endpoint_tls_check":{"checked_at":"2026-11-04T09:53:34.521356+00:00","success":true,"detail":"Valid TLS connection to advertised endpoint host; no A2A request sent"},"protocol_check":{"checked_at":"2026-11-04T09:53:34.521356+00:00","endpoint":"https://meridian.miodiollc.com","protocol_binding":"HTTP+JSON","protocol_version":"1.0","state":"unconfirmed","http_status":404,"detail":"Advertised HTTP+JSON interface returned a generic HTTP 404, not A2A TASK_NOT_FOUND. Publish the A2A service base URL with its standard task route; an ordinary REST resource URL does not establish A2A support","request_diagnostics":{"requests":[{"path":"/tasks/localmark-probe-ac4309c4-f998-4947-af9b-0289f75e4fdc","allow":[],"method":"GET","status":404,"version_header":"1.0","protocol_method":null,"redirect_followed":false}],"capture_version":1}},"declared_primary_endpoint":"https://meridian.miodiollc.com","selected_connection_interface":{"url":"https://meridian.miodiollc.com","protocolBinding":"HTTP+JSON","protocolVersion":"1.0"},"protocol_interface_checks":[{"endpoint":"https://meridian.miodiollc.com","protocol_binding":"HTTP+JSON","protocol_version":"1.0","selected":true,"state":"unconfirmed","checked_at":"2026-11-04T09:53:34.521356+00:00","http_status":404,"detail":"Advertised HTTP+JSON interface returned a generic HTTP 404, not A2A TASK_NOT_FOUND. Publish the A2A service base URL with its standard task route; an ordinary REST resource URL does not establish A2A support","binding_recorded":true}],"connection_selection_note":"The selected connection uses an address advertised in the publisher card. Read-only observations do not establish task quality or safety.","x402_price_check":null,"events":[{"observed_at":"2026-11-03T13:15:48.053403+00:00","event_type":"card_changed","detail":"Confirmed published card change: description, advertised_endpoints, skills_updated, other_card_fields; fingerprint fe6129e10d16"},{"observed_at":"2026-10-21T20:18:47.676518+00:00","event_type":"card_changed","detail":"Confirmed published card change: skills_added, other_card_fields; fingerprint bd4a2c178d44"},{"observed_at":"2026-10-17T22:28:42.314812+00:00","event_type":"card_changed","detail":"Confirmed published card change: description, skills_added, skills_updated, other_card_fields; fingerprint 08ab80862cee"}],"relationships":[],"verification":{"agent_card_url":"https://meridian.miodiollc.com/.well-known/agent-card.json","last_successful_card_check":"2026-11-04T09:53:34.521356+00:00","latest_card_check":{"checked_at":"2026-11-04T09:53:34.521356+00:00","success":true,"http_status":200,"detail":"Agent Card validated"},"signature_status":"unsigned","signature_checked_at":"2026-11-04T09:53:34.521356+00:00","task_endpoint_tested":true,"task_execution_tested":false,"endpoint_tls_checked_at":"2026-11-04T09:53:34.521356+00:00","endpoint_tls_reachable":true,"protocol_check_state":"unconfirmed","protocol_checked_at":"2026-11-04T09:53:34.521356+00:00","provider_identity_verified":false,"domain_claimed_at":null,"domain_proof_checked_at":null},"synthetic_capability_tests":{"agent_id":541907,"status":"not_tested","reason_code":"not_yet_tested","consent_status":"not_confirmed","latest_observation_status":null,"last_checked_at":null,"fixture_version":"1","reference_demonstration":false,"scope":"A publisher-authorized synthetic test of a dedicated free test endpoint. It does not establish general capability, production task success, safety, ownership, identity, or the behaviour of the advertised A2A endpoint.","methodology_url":"https://localmark.ai/capability-tests","history":[]},"repair_links":{"agent_repair_url":"https://localmark.ai/agents/541907/repair","publisher_report_url":"https://localmark.ai/publishers/miodiollc.com/repair","diagnostics_json_url":"https://localmark.ai/publishers/miodiollc.com/repair/diagnostics.json","diagnostics_csv_url":"https://localmark.ai/publishers/miodiollc.com/repair/diagnostics.csv"},"_localmark":{"contribution":{"optional":true,"directory_access":"free","operator_authorization_required":true,"affects_rankings":false,"message":"LocalMark is free. Optional contributions help fund ongoing checks.","support_url":"https://localmark.ai/support","metadata_url":"https://localmark.ai/api/v1/support/contributions"}}}