MCP HeartbeatTHE MCP OBSERVATORY
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Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

DiscoveryServer directory

Remote MCP servers

Find a server for your workflow, with connection evidence you can inspect.

Connect your agent

3366 servers

Ordered by checks passedClear filters
Dated server measurements. The status describes the last probe or a listed authentication requirement. Checks that have not been measured are not failures. Open a server to inspect the evidence.
Server / capabilityLast probeMedian latencyChecks passedLast checked
Barcode Generator API

Generate barcodes — EAN-13, UPC-A, Code128, Code39. Returns SVG. x402 micropayment.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Base DeFi Yield Optimizer API

Base chain DeFi yields — Aerodrome, Moonwell, APY, TVL, risk scores. x402.

Finance & CryptoCode & DevOps

Outdated checkNot measured4 / 22
Base USDC Payment Verifier (x402)

Verify a Base tx is a confirmed native-USDC transfer to a recipient. Paid via x402, 0.01 USDC/call.

Finance & CryptoPayments & trading

UnreachableNot measured4 / 22
Base64 Codec API

Encode/decode base64 and URL-safe base64. x402 micropayment.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Belgium Payments (Mollie — Bancontact)

Belgium payments for AI agents — Bancontact via Mollie. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Blackhull trading post: pre-trade checks for agents on Base

Before your agent buys a Base token: can it sell it back? Plus x402 service grades and providers.

Finance & CryptoPayments & trading

UnreachableNot measured4 / 22
Brazil Payments (Mercado Pago — Pix / cards / boleto)

Brazil payments for AI agents — Pix, cards, boleto via Mercado Pago. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Bulgaria Payments (Stripe — cards / Apple Pay)

Bulgaria payments for AI agents — cards / Apple Pay via Stripe. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Canada Payments (Stripe — cards / Apple Pay)

Canada payments for AI agents — cards / Apple Pay via Stripe. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Cassandra shop

An autonomous AI agent shop: catalogue, live vitals, payable x402 terms, and a free shape check.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
ChainChoice published rankings

Read-only ChainChoice rankings: sourced, dated comparisons of crypto services, with evidence.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Chile Payments (Mercado Pago — Mercado Pago wallet)

Chile payments for AI agents — Mercado Pago wallet via Mercado Pago. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
ClawAgent

AI agent marketplace with MCP support and HTTP 402 micropayments (x402/intmax402).

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Clink Forge

Pay-per-call government data over x402: provenance chains, Ed25519 attestations, no API keys.

GovernmentPayments & trading

UnreachableNot measured4 / 22
Code Sandbox API

Execute Python, JavaScript, SQL code in a sandbox. x402 micropayment.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Colombia Payments (Mercado Pago — PSE / Nequi)

Colombia payments for AI agents — PSE / Nequi via Mercado Pago. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Color Palette Generator API

Generate harmonious color palettes — complementary, analogous, triadic. x402 micropayment.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Concierge Intel

Pay-per-call DeFi and macro intel for AI agents. x402 USDC tools via streamable HTTP /api/mcp.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Costa Rica Payments (ONVO Pay — SINPE Movil)

Costa Rica payments for AI agents — SINPE Movil via ONVO Pay. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Croatia Payments (Stripe — cards / Apple Pay)

Croatia payments for AI agents — cards / Apple Pay via Stripe. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Cron Parser API

Parse, validate and explain cron expressions. Get next run times. x402 micropayment.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Crontab Generator API

Natural language to cron expression converter. x402 micropayment.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Cross-Chain Bridge Route API

Best cross-chain bridge routes with fees, time, providers. LI.FI-powered. x402.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Crypto Market Pulse

Pay-per-call crypto data on Base: market pulse, prices, chain snapshot, USDC stats. x402 USDC.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22

Automated measurements. Not a rating. Unmeasured checks are not failures. How to read the evidence