{"id":"ca4ac3aa-09b","name":"Base gas price + fee estimate in USD (MCP)","description":"Base gas snapshot: gas price, base fee, priority fee, 10-block base-fee trend, ETH/USD from Chainlink and estimated USD cost for a transfer, swap or custom gasLimit. Paid MCP tool, x402 over MCP, USDC on Base.","endpoint_url":"https://nightshift-x402.nightshift-labs.workers.dev/mcp/base_gas","endpoint_canonical":"https://nightshift-x402.nightshift-labs.workers.dev/mcp/base_gas","category":"data.onchain","kind":"api","price_amount":0.005,"price_currency":"USDC","chains":["base"],"request_schema":null,"response_schema":null,"sample_query":"https://nightshift-x402.nightshift-labs.workers.dev/sample/v1/base/gas","facilitator_url":null,"status":"verified","delisted_reason":null,"origin":"submitted","ephemeral":false,"created_at":1793919697,"updated_at":1793921311,"status_changed_at":1793921311,"embedding_synced_at":1793919699,"score":1,"p50_latency_ms":null,"p95_latency_ms":null,"p99_latency_ms":null,"probe_count":58,"probes_passed":58,"last_ok_at":1794020318,"consecutive_failures":0,"last_probed_at":1794020318,"probe_interval_s":1800,"distinct_payers":0,"x402_version":2,"transport":"mcp","obs_scheme":"exact","accepts_count":1,"accepts_index":0,"obs_network":"eip155:8453","obs_asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","obs_pay_to":"0xb5aFc89b57Fa8270bB7261348179D28099BEa2a0","amount_atomic":"5000","amount_usd":0.005,"domain_name":"USD Coin","domain_version":"2","observed_at":1794020318,"obs_first_seen_at":1793919873,"price_changed_at":null,"pay_to_changed_at":null,"payto_unstable":false,"payto_distinct_recent":1,"onchain_provider_status":null,"onchain_payto_checked":"0xb5afc89b57fa8270bb7261348179d28099bea2a0","onchain_checked_at":1794018995,"onchain_last_attempt_at":1794018995,"onchain_provider_error":0,"onchain_source":"index","header_bytes":538,"verified_via":"MCP","testnet":false,"payment_protocols":["x402"],"mpp_methods":null,"mpp_offers":null,"mpp_note":null,"onchain_payto_shared_listings":19,"onchain_count_capped":false,"onchain_shape":null,"onchain_daily":[{"day":"2026-10-23","tx":1,"payers":1,"usd":1.400077},{"day":"2026-11-02","tx":4,"payers":2,"usd":0.04},{"day":"2026-11-06","tx":20,"payers":3,"usd":0.21727},{"day":"2026-11-07","tx":1,"payers":1,"usd":0.003}],"latest_purchase_delivered":null,"latest_purchase_at":null,"paid_verification_latest":null,"paid_verification":{"verified":false},"has_sample":true,"method_note":"This endpoint asks for payment inside MCP tool results (the x402 MCP transport), not with an HTTP 402. Call it with an MCP client that handles x402.","paid_verified":false,"paid_verified_at":null,"paid_depth":{"rung":"none","deliveries":0,"span_weeks":0,"first_ok_at":null,"last_ok_at":null,"last_attempt_ok":null,"through_change":false,"first_ok_at_iso":null,"last_ok_at_iso":null},"payto_sentinel":false,"payto_note":null,"evidence_tier":"probe_verified","evidence_note":"Sustained protocol conformance over many checks from our infrastructure. Says nothing about content accuracy.","verdict_age_seconds":288,"probe_tier":"watch","next_check_by":1794022118,"next_check_basis":"watch tier, re-probed every 30 minutes: unverified, failing (up to 10 in a row), failed in the last 24 h, payment terms changed in the last 7 days, or new or changed status in the last 7 days; a record past next_check_by is stale by our own rule","last_probed_at_iso":"2026-11-07T02:58:38Z","next_check_by_iso":"2026-11-07T03:28:38Z","status_changed_at_iso":"2026-11-05T23:28:31Z","paid_verified_at_iso":null,"probes_failed":0,"onchain_scope":"wallet-level, NOT this endpoint's: the payTo address is shared by 19 active listings, so these on-chain counts cover all of them; never attribute them to one endpoint or add them across listings","onchain_wallet":{"scope":"wallet-level, NOT this endpoint's: the payTo address is shared by 19 active listings, so these on-chain counts cover all of them; never attribute them to one endpoint or add them across listings","shared_by_listings":19,"pay_to":"0xb5afc89b57fa8270bb7261348179d28099bea2a0","tx_count_30d":26,"unique_payers_30d":7,"volume_usd_30d":1.660347},"onchain_tx_count_30d":26,"onchain_unique_payers_30d":7,"onchain_volume_usd_30d":1.660347,"created_at_iso":"2026-11-05T23:01:37Z","updated_at_iso":"2026-11-05T23:28:31Z","embedding_synced_at_iso":"2026-11-05T23:01:39Z","last_ok_at_iso":"2026-11-07T02:58:38Z","observed_at_iso":"2026-11-07T02:58:38Z","obs_first_seen_at_iso":"2026-11-05T23:04:33Z","onchain_checked_at_iso":"2026-11-07T02:36:35Z","onchain_last_attempt_at_iso":"2026-11-07T02:36:35Z","paid_verified_age_days":null,"latest_purchase_age_days":null,"report_outcome":{"how":"POST https://api.nohumans.directory/v1/reports","when":"after you paid this endpoint on Base, whether or not it delivered","body":{"listing_id":"ca4ac3aa-09b","ok":"JSON boolean: did it deliver what it promised","tx_hash":"your payment's transaction hash on Base","payer_signature":"EIP-191 personal_sign of message_to_sign by the wallet that paid"},"message_to_sign":"nohumans.directory report v1\nlisting_id: ca4ac3aa-09b\ntx_hash: <tx_hash, lowercase>\nok: <true|false>","distinct_payers_reported":0,"weight":"counts toward ranking once 3+ distinct payers have reported this listing","help":"https://api.nohumans.directory/v1/reports"},"observed":{"checked_at":1794020318,"x402_version":2,"challenge_transport":"mcp","scheme":"exact","network":"eip155:8453","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","pay_to":"0xb5aFc89b57Fa8270bB7261348179D28099BEa2a0","payment_options":1,"accepts_index":0,"extra":{"name":"USD Coin","version":"2"},"amount_atomic":"5000","amount_usd":0.005,"eip712_domain":{"name":"USD Coin","version":"2"},"price_stable_since":1793919873,"price_matches_listing":true,"payto_stable_since":1793919873,"checked_at_iso":"2026-11-07T02:58:38Z","price_stable_since_iso":"2026-11-05T23:04:33Z","payto_stable_since_iso":"2026-11-05T23:04:33Z"}}