Servidor MCP

x402-list-mcp

com.x402-list/x402-list-mcp
Pagos y fintech Búsqueda e investigación Público y accesible MCP 2025-11-25

Qué hace este MCP

Searches and evaluates x402 payment APIs using service health, uptime, pricing, compliance, change events, and on-chain settlement data.

x402_assess_services
Assess x402 services (paid)
Call this when the free signals have run out: you hold 2 to 8 finalists from x402_search_services or x402_find_best_service, their stored fields do not separate them for YOUR stated need, and choosing wrong costs more than a quarter. It buys one fresh AI assessment reasoned against your question, not a cached grade; reading an already-computed assessment stays free via x402_get_service. Price: a one-time $0.25 USDC on Base, over two calls. Call once WITHOUT payment_signature_b64 to receive the x402 payment challenge verbatim (accepts[], amount, payTo, and a base64 PAYMENT-REQUIRED header); sign accepts[0] client-side with your own wallet; call again with the SAME question and services plus payment_signature_b64 to receive the report and a base64 PAYMENT-RESPONSE settlement receipt. This server holds no keys, never signs and never settles: it only relays the challenge. Optionally add probe { slug, endpoint_path? } to have one listed service paid and called for real and its answer analyzed: the challenge is then priced at $0.25 plus that endpoint price X, and the report gains a probe_report block with a verdict and truncated extracts, never the verbatim third-party body. When live probing is not armed the probe is ignored. Caveats: read the amount to sign from accepts[0].amount, never from a fixed figure, since a probe changes it; probe fees are non-refundable whatever the verdict; if the fresh run cannot be produced the server answers before settling, so you are never charged for nothing; there is no refund. Prices are US dollars.
Acceso externo
Esquema de entrada
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['question', 'services'], 'properties': {'probe': {'type': 'object', 'required': ['slug'], 'properties': {'slug': {'type': 'string', 'maxLength': 200, 'minLength': 1, 'description': 'Slug of one listed service to probe live (must be one of the services above or another listed slug).'}, 'endpoint_path': {'type': 'string', 'maxLength': 500, 'minLength': 1, 'description': "Optional URL path on that service to probe, beginning with '/'. Omit to let the server pick the cheapest priced USDC-on-Base endpoint."}}, 'description': 'Optional live-probe request: pay one listed service for real and analyze what it returns. When the server has probing armed the price becomes $0.25 plus that endpoint price X (non-refundable); the report gains a probe_report block with a verdict and truncated extracts, never the verbatim third-party body. Ignored when probing is not armed.', 'additionalProperties': False}, 'question': {'type': 'string', 'maxLength': 1000, 'minLength': 1, 'description': 'The need to assess the shortlist against (1 to 1000 characters).'}, 'services': {'type': 'array', 'items': {'type': 'string', 'maxLength': 200, 'minLength': 1}, 'maxItems': 8, 'minItems': 1, 'description': 'Service slugs to compare for the need (1 to 8; find them with x402_search_services or x402_find_best_service).'}, 'payment_signature_b64': {'type': 'string', 'minLength': 1, 'description': 'Base64 PAYMENT-SIGNATURE for the x402 payment, produced by signing the accepts[0] challenge client-side. Omit on the first call to receive the challenge; set it on the retry to run the paid assessment.'}}, 'additionalProperties': False}
x402_change_events
x402 service change events
Call this before you trust anything you cached about a service, and right after a payment failed for no obvious reason: the monitor's log of what moved under you. Returns payTo, price and 402-schema changes observed on listed services, most recent first, in exactly three event types (payto_changed, price_changed, schema_changed). Filter with service (the slug), type, and days (1 to 365, default 90). Caveats: prices here are atomic token amounts, never dollars, and every payTo is masked by design, so the feed reports THAT the payout address changed, never the address. Free and read-only.
Solo lectura Acceso externo
Esquema de entrada
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'properties': {'days': {'type': 'integer', 'default': 90, 'maximum': 365, 'minimum': 1, 'description': 'Lookback window in days, 1 to 365 (default 90). Events older than the window are not in the feed.'}, 'page': {'type': 'integer', 'default': 1, 'minimum': 1, 'description': '1-based page index into the filtered event set (see total_pages).'}, 'type': {'enum': ['payto_changed', 'price_changed', 'schema_changed'], 'type': 'string', 'description': "Restrict to one kind of change: 'payto_changed' (the payout address set changed), 'price_changed' (at least one endpoint's price changed), 'schema_changed' (the 402 envelope gained or lost accepts entries or priced endpoints). Omit for all three."}, 'service': {'type': 'string', 'maxLength': 200, 'minLength': 1, 'description': "Service slug to restrict the feed to, e.g. 'exa' (the same slug x402_get_service takes). Omit for changes across every listed service."}, 'per_page': {'type': 'integer', 'default': 25, 'maximum': 100, 'minimum': 1, 'description': 'Events per page, 1 to 100 (default 25). Each event carries the full before/after envelope snapshots, so a large page is heavy.'}}, 'additionalProperties': False}
x402_check_health
Check x402 service health
Call this before you send a payment, or right after a call unexpectedly failed: is this service up right now. With no slug, the directory snapshot: five status counts across 500+ services (include_services=true attaches every row). With a slug: that service's status, its 24h/7d/30d/90d uptime windows, response time, consecutive failures, daily snapshots. No money fields.
Solo lectura Acceso externo
Esquema de entrada
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'properties': {'slug': {'type': 'string', 'maxLength': 200, 'minLength': 1, 'description': 'Service slug for a single-service health report. Omit for the whole directory.'}, 'uptime_period': {'enum': ['24h', '7d', '30d', '90d'], 'type': 'string', 'default': '30d', 'description': 'Daily uptime snapshot window for single-service mode.'}, 'include_services': {'type': 'boolean', 'default': False, 'description': 'Directory mode only (no slug): if true, also attach the full per-service status array. Off by default so a directory health check returns just the five status counts, not every service.'}}, 'additionalProperties': False}
x402_facilitator_volumes
x402 facilitator volumes
Call this when the question is about the rail rather than the service: which x402 facilitator actually settles money, and how much. Returns on-chain-verified settlement volume and transaction counts per facilitator for today (UTC), 7d, 30d and all-time, plus a verification flag ('on-chain' once volume has been observed on-chain, else 'listed'), across more than 30 facilitators. Optional daily timeseries (up to 90 days) and per-chain breakdown. Volume is decimal USD. Caveats: PER-FACILITATOR, never per-service; the *_24h fields cover today (UTC) so far, not a trailing 24 hours, and reset at 00:00 UTC, so prefer 7d.
Solo lectura Acceso externo
Esquema de entrada
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'properties': {'days': {'type': 'integer', 'default': 30, 'maximum': 90, 'minimum': 1, 'description': 'Length of the timeseries in days (only used when include_timeseries is true).'}, 'page': {'type': 'integer', 'default': 1, 'minimum': 1}, 'per_page': {'type': 'integer', 'default': 25, 'maximum': 100, 'minimum': 1}, 'timeframe': {'enum': ['24h', '7d', '30d', 'all'], 'type': 'string', 'default': '7d', 'description': "Drives the sort order of the returned facilitators. '24h' sorts by today (UTC) so far, not by a trailing 24-hour window."}, 'include_chains': {'type': 'boolean', 'default': False, 'description': 'Include a per-chain (network/asset) volume breakdown per facilitator.'}, 'include_timeseries': {'type': 'boolean', 'default': False, 'description': 'Include a daily volume_usd / tx_count series per facilitator.'}}, 'additionalProperties': False}
x402_find_best_service
Find best x402 service
Call this when you have a need in words and want one service to call rather than a list to read: it is the free ranking step between searching and paying. Pass the need as q, plus any category, network, price cap or verification requirement, and get up to 20 ranked recommendations with the basis each one placed on. Ranking is mostly per-service reliability (live status, verification, uptime, response time), x402 compliance, and price in USD, with a small (about 10%) weight on measured on-chain settlement traction that can never dominate those three. The response carries ranking_version (currently 3), need_blind_ranking (true when no q was given, so the order is global quality rather than your need), and a units map holding every scoring caveat in full: the compliance cap, the pro-quota rule for shared payout addresses, renormalization, the $10 volume floor, and the single-buyer discount. Read units before comparing scores across generations.
Solo lectura Acceso externo
Esquema de entrada
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'properties': {'q': {'type': 'string', 'maxLength': 200, 'minLength': 1, 'description': 'Free-text need description to match against name/description.'}, 'limit': {'type': 'integer', 'default': 5, 'maximum': 20, 'minimum': 1, 'description': 'How many ranked recommendations to return.'}, 'prefer': {'enum': ['balanced', 'cheapest', 'fastest', 'most_reliable'], 'type': 'string', 'default': 'balanced', 'description': 'Tie-breaking emphasis for the ranking weights.'}, 'network': {'type': 'string', 'maxLength': 50, 'minLength': 1, 'description': "Required network name or abbreviation, e.g. 'Base' or 'BSE'; any network code returned by /api/v1/networks is accepted."}, 'category': {'type': 'string', 'maxLength': 100, 'minLength': 1, 'description': 'Desired service category.'}, 'max_price_usd': {'type': 'number', 'minimum': 0, 'description': 'Cap on min_price_usd in US dollars; cheaper or equal passes.'}, 'require_verified': {'type': 'boolean', 'default': False, 'description': 'If true, only verified services are eligible.'}, 'include_facilitator_context': {'type': 'boolean', 'default': False, 'description': 'If true, also return top facilitators by 7d settlement volume as separate ecosystem context (NOT per-service).'}}, 'additionalProperties': False}
x402_get_service
Get x402 service
Call this once you hold a slug and are deciding whether to commit to that service: the full record behind a directory row. Live status, uptime over 24h/7d/30d/90d, average response time, networks and settlement asset, every priced endpoint, and the assessment block. include_series=true adds 90 daily points of on-chain volume and distinct buyers. Read the units map in the response: the per-endpoint price field is atomic token units, not dollars.
Solo lectura Acceso externo
Esquema de entrada
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['slug'], 'properties': {'slug': {'type': 'string', 'maxLength': 200, 'minLength': 1, 'description': "Service slug, e.g. 'my-api'."}, 'include_series': {'type': 'boolean', 'default': False, 'description': "If true, also attach this service's daily on-chain series under `series` (settlement volume and distinct buyers, one point per UTC day over the most recent 90 days, oldest first). Off by default to keep the response small."}}, 'additionalProperties': False}
x402_search_services
Search x402 services
Your first call when you do not know which x402 service exists for a job: it narrows a directory of 500+ listed services to candidates. Filter by free-text query, category, network, live status, and whether the last observed 402 envelope is signable by a standard x402 client; sort by newest, uptime, cheapest, or endpoints. Returns up to 100 compact summaries a page: price in decimal USD, uptime, status, verification. Then x402_get_service for the full record.
Solo lectura Acceso externo
Esquema de entrada
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'properties': {'q': {'type': 'string', 'maxLength': 200, 'minLength': 1, 'description': 'Free-text search across name, description, category, base_url.'}, 'page': {'type': 'integer', 'default': 1, 'minimum': 1, 'description': '1-based page index into the filtered result set (see meta.total_pages).'}, 'sort': {'enum': ['newest', 'uptime', 'cheapest', 'endpoints'], 'type': 'string', 'default': 'newest', 'description': 'Server-side sort order.'}, 'fields': {'enum': ['compact', 'full'], 'type': 'string', 'default': 'compact', 'description': "Response detail: 'compact' (default) = lean summaries (identity, price, status, uptime, verification, networks, compliance grade), 'full' = every field including the per-service assessment block. Compact keeps a directory sweep small enough to not truncate."}, 'status': {'enum': ['online', 'degraded', 'offline', 'unknown', 'all'], 'type': 'string', 'default': 'all', 'description': 'Filter by live monitoring status.'}, 'network': {'type': 'string', 'maxLength': 50, 'minLength': 1, 'description': "Network name or abbreviation, e.g. 'Base' or 'BSE'; any network code returned by /api/v1/networks is accepted. Omit for all."}, 'category': {'type': 'string', 'maxLength': 100, 'minLength': 1, 'description': 'Exact category name (see categories context). Omit for all.'}, 'per_page': {'type': 'integer', 'default': 25, 'maximum': 100, 'minimum': 1, 'description': "Services per page, 1 to 100 (default 25). Higher values return larger results; with fields='full' a large page can be very heavy, so prefer compact when raising it."}, 'signable': {'type': 'boolean', 'description': 'Filter on the signability of the last observed 402 envelope: true = no EVM route of the service was observed missing the EIP-712 domain parameters (extra.name and extra.version) that a standard x402 client requires in order to sign a payment, false = at least one such route was observed. It describes the payment envelope on the wire, not the merit of the service. A service whose latest assessment has not measured that check yet matches NEITHER value, so omit this parameter to include it. Filtered server-side, so the result total covers the whole filtered set.'}, 'verified_only': {'type': 'boolean', 'default': False, 'description': 'If true, return only verified services. Filtered server-side, so the result total covers the whole verified set, not just this page.'}}, 'additionalProperties': False}
Añadido
x402_change_events
17 de September de 2026 a las 12:38
Añadido
x402_assess_services
17 de September de 2026 a las 12:38
Añadido
x402_facilitator_volumes
17 de September de 2026 a las 12:38
Añadido
x402_check_health
17 de September de 2026 a las 12:38
Añadido
x402_find_best_service
17 de September de 2026 a las 12:38
Añadido
x402_get_service
17 de September de 2026 a las 12:38
Añadido
x402_search_services
17 de September de 2026 a las 12:38

Tenjin

blog.tenjin/tenjin

Searches, reads, and publishes paid essays and synthesized answers, with USDC payments handled through x402.

SCRIPTMASTERLABS — SqueezeOS MCP

com.scriptmasterlabs/squeezeos

Discovers and routes machine capabilities, provides web access and search verification, and supports caller-authorized x402 payme…

x402 Market Intelligence + Russian Web Access

com.ruscrape/russia-access

Fetches websites through country-specific or residential IPs, provides Russian web access and proxies, runs sandboxed code, and o…

Anyway Possible Paid Agent Utilities

io.github.anyway-possible/agent-utilities

Provides Base wallet and payment-readiness checks, merchant intelligence, public URL verification, and verifiable web evidence th…

What Agents Buy

com.whatagentsbuy/whatagentsbuy

Evaluates x402 API sellers, checks payment safety and value, ranks providers by accuracy or demand, and reports on marketplace ac…

Agent Deals

io.github.gmahar82-stack/agent-deals

Checks and compares x402 services, finds lower-cost working APIs, and reads public webpages or PDFs as Markdown.

ghost-x402-market-intel-vet-schema

dev.workers.ghost-agent-os.ghost-identity/ghost-x402-market-intel-vet-schema

Evaluates and vets paid x402/API providers, applies pre-spend decisions, checks schema freshness, and performs failover web searc…

nohumans.directory

directory.nohumans/registry

Discovers and evaluates paid x402 APIs and datasets, including pricing, schemas, payment chains, reputation, and verified deliver…