The tools agents can call

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Coal - Payments for AI agents

coal

# Coal Coal gives AI agents a real checkout. Discover merchants through the decentralized 0G Storage catalog, pay autonomously in USDC on Base via x402 (Coinbase) or OKX APP (v2 envelope), and download purchased products — all without a human in the loop. Receipts are anchored on 0G Chain, allowing any third party to independently verify payments without trusting Coal itself. The MCP server is fully multi-tenant: every user supplies their own wallet key through the `X-Coal-Agent-Key` header, meaning the server never stores long-lived private keys or custody secrets. Agents are gasless by default — Coal covers operator gas costs. --- ## MCP Tools (13) ### Discovery & Marketplace * `discover_merchants` Browse the marketplace as a Markdown product grid * `search_products` Search and filter by product name, price, or tags * `get_merchant_profile` Retrieve merchant metadata and payout addresses * `query_merchant_memory` Natural-language merchant Q&A powered by TEE-backed 0G Compute --- ### Payments & Checkout * `check_paywall` Check whether an address has already paid * `create_checkout` Create a Coal checkout session *(requires API key)* * `get_checkout_status` Retrieve checkout session state and payment status * `pay_merchant` Send USDC on Base using ERC-3009 gasless transfers --- ### Verification & Delivery * `verify_receipt` Verify the complete proof trail: 1. Base transaction 2. 0G Storage receipt 3. 0G Chain anchor * `download_product` Verify on-chain payment and return a signed download URL --- ### Infrastructure & Agent Utilities * `get_0g_health` Check live 0G mainnet status * `agent_wallet_status` View derived wallet address and USDC balance * `setup_instructions` Print the full integration and setup guide --- ## Live Demos * Claude paying $0.10 for an ebook end-to-end `https://agent.usecoal.xyz` * x402 paywall demo `https://oracle.usecoal.xyz/api/price/ETH` --- ## Stack * Dual-protocol support: * Coinbase x402 * OKX APP * Base USDC settlement * 0G Storage receipts * 0G Chain receipt anchoring * 0G Compute Sealed Inference for policy execution * ERC-3009 gasless payment flow ---

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coauthor

oniiranen

Coauthor is a multi-vendor collaboration layer for AI agents, with two surfaces: Inline code & text review. Paste a snippet — or hand off whatever you're working on — and ask a different-vendor model to critique it. The review comes back in the same chat turn. No document required. Optionally persist the result as a searchable public reference so the next dev hitting the same problem finds it. Persistent collaborative documents. Specs, recipes, references, style guides, and Q&A threads that humans and agents co-author section-by-section (outline → draft → review → publish). Soft claims keep collaborators from stomping each other; a public catalog lets anyone contribute. Cross-vendor reviews land as attributed comments or answers on the doc.

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COBOL Bridge

csgaglobal

AI-powered COBOL mainframe modernization platform with 11 MCP tools, 3 resources, and 3 prompts. Parse copybooks, assess CICS integrations, scan JCL batch jobs, map VSAM files, translate EBCDIC, bridge ISO 20022 payments, run post-quantum cryptography assessments, fingerprint regulatory compliance (SOC 2, GDPR, HIPAA), discover COBOL codebases, generate REST APIs from COBOL, and automate test suites. Includes migration guides, API references, and modernization assessment prompts for enterprise mainframe-to-cloud transitions.

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Cobra · Facturación SRI Ecuador

soporte

El primer servidor MCP de facturación electrónica del SRI de Ecuador. Emite facturas, notas de venta, notas de crédito/débito y retenciones autorizadas por el SRI en tiempo real, con lenguaje natural desde tu agente de IA (Claude, ChatGPT, Cursor). Incluye validación de RUC, consulta de estado, anulación guiada y sandbox de pruebas. Ideal para negocios, RIMPE, contadores y desarrolladores en Ecuador. The first MCP server for Ecuador's SRI electronic invoicing (e-invoicing): issue SRI-authorized invoices, sales notes, credit/debit notes and withholding receipts in natural language. Includes RUC lookup, status checks, guided voiding and a sandbox.

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Cobrain

cobrain

Every AI keeps its own memory, locked inside its chats. Switch model, open a new chat or hand work to a colleague, and the context is gone. Cobrain is one memory that all your AIs connect to: plain Markdown notes, organized in folders, that Claude, ChatGPT, Claude Code, Codex and any MCP client can read and write. What one AI saves, the next one finds. - Search, read and load whole folders of context before a task - Write, append, move and organize notes from any AI - Share a folder or a single note with a colleague: their AI reads it too - Version history shows which AI or person wrote what - Your AI can never do more than you: it acts with your own permissions - Export everything as Markdown whenever you want Sign in with OAuth, no API keys. Free plan: 1,000 notes, unlimited AIs, 3 read-only shares. Data hosted in the EU.

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code402 Verify — Compliance MCP for AI Agents

drjsarat

Compliance verification MCP server for AI agents: IBAN, LEI, Luhn, Mod97, sanctions screening, onchain address checks, and chain RPC queries. 18 tools, WASM-backed banking functions. Paid per call via x402 (gasless EIP-3009 USDC on Base) — non-custodial. Free: receipt verification + price lookup + 3 paid probes/day.

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codeindex

munhq

Structural code intelligence over MCP: find a definition, read one function, see what calls a symbol, trace imports and judge a change's blast radius across 40+ languages — in tens of tokens instead of the ~1,563 a file read costs.

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CodeMouse

squidcode

AI code reviewer for GitHub pull requests. Read-only access to your CodeMouse accounts, repositories, and PR reviews — status, duration, cost, tokens, and per-provider runs. Scoped to accounts you own or belong to.

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codepostalpro

abeopress

Postal & ZIP code data for 122 countries with cited sources — built for AI agents. Two tiers, honestly labelled. Curated (US, France, Algeria, Tunisia, Morocco): one lookup for any US ZIP returns city, county + FIPS, state, coordinates, IANA time zone, NANPA area codes, 119th-Congress districts, US Census ACS demographics (population, density, land area, incomes, home value, rent, age, households), NOAA 1991–2020 climate normals and the USDA planting zone. Bulk (~115 more countries — GB, DE, CA, IN, JP, MX, BR…): 1.7M postal codes from GeoNames with place, admin areas and coordinates, marked tier "bulk". Every value carries its `sources` and a `verification` status, so agents can relay provenance; conflicts are surfaced with both values instead of silently resolved. 7 read-only tools including place search, nearby-by-coordinates and a US area-code reverse lookup (states, cities and overlay codes — e.g. 310/424). Authless: 1,000 calls/day per IP free; a free key from https://codepostalpro.com/api/ raises it to 5,000. Also in the official MCP Registry as com.codepostalpro/postal-codes.

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CodeQR

codeqr

Create and manage CodeQR short links and QR codes, and pull scan, click and conversion analytics — from any MCP client. Each QR code encodes a short link rather than the destination itself, so where it leads can be changed after it has been printed or shared, without reprinting anything. Every scan and click is recorded with time, country and device.

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Coderbuds

coderbuds

Your team's shipping standards, org map and delivery metrics, inside your coding agent.

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CodeRide

PixdataOrg

CodeRide eliminates the context reset cycle once and for all. Through MCP integration, it seamlessly connects to your existing AI coding workflow, enhancing how you vibe code. Once connected, CodeRide transforms your development tasks into a structured Kanban, where each task preserves complete context and instructions your AI needs to work autonomously. Compatible with all major AI code editors including Cursor, Cline, and Windsurf, plus any MCP client like Claude.ai.

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CodeRifts API Governance

coderifts

Signed, offline-verifiable decisions on API contract changes for AI agents. Three tools: preflight_change_set, verify_receipt, get_decision_details. The tool surface is pinned — its digest is published and checkable from three independent sources.

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Codex Reset

suvadadepolo

Read-only OpenAI Codex usage-limit reset data from codex-reset.com: the reset probability for the next 24 and 48 hours, the dated record of verified resets with source links, and Codex service status to tell an outage apart from a usage limit. Free, no API key, no session.

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Coding Agent by OpenHelm

maxbeech

Plan, implement, and validate software changes using a virtual computer equipped with a full coding agent, development tools, browsers, and file access. Coding Agent by OpenHelm enables your agent to carry out work such as: • Implementing new features • Fixing bugs • Refactoring codebases • Updating documentation • Creating and validating pull requests What makes OpenHelm the best solution for this: • AI monitors implementation progress and verifies work against the intended outcome • Can investigate code, documentation, issues, and related systems using a real browser • Multi-step workflows support planning, coding, testing, validation, and iteration • Operates within a secure remote environment designed for autonomous development work For software teams looking to accelerate execution, OpenHelm provides an environment where development tasks can be completed from start to finish with minimal supervision.

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cofferdock

contacto-y9sc

Give your AI assistant 25 tools that create real files: HTML to image and PDF, website screenshots, QR codes, charts, PDF editing, image conversion, zips and validators.

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cogmemai

hifriendbot

Persistent cloud memory for Ai coding assistants. 33 MCP tools, 85% accuracy on LoCoMo benchmark. Semantic search, auto-skills, knowledge graph, quantum-safe encryption. Your Ai remembers everything across sessions, editors, and machines.

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CognifAI

cognifaiapp-pkm

CognifAI helps you capture, organize, and connect ideas across domains. The CognifAI MCP server exposes your knowledge base directly to AI assistants via the Model Context Protocol, enabling natural-language interaction with your data. Available tools: - list_realms — Browse all realms (workspaces) you have access to - get_realm_ideas — List all ideas within a realm - get_idea — Fetch the full content of a specific idea - search_ideas — Full-text search across one or all realms - create_idea — Add new ideas directly from your AI assistant - update_idea — Edit titles, content, and tags on existing ideas Authentication: OAuth 2.0 with PKCE (remote HTTP server) Access: Requires a paid CognifAI plan (Pro or Pro+) Server URL: https://cognifai.app/api/mcp

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cognitive-gateway

mayone

Maha OS Cognitive Gateway: Biological Sovereignty Node Maha OS is a cognitive circuit breaker designed to defend attention and physiological autonomy against high-frequency algorithmic extraction. Instead of relying on willpower, it gives your personal AI agent structural authority to intervene. This Model Context Protocol (MCP) server is the bridge between a user's AI agent and their Maha OS mobile client. It lets AI models operate as tactical allies that actively protect the user's digital minimalism and metabolic state. Core Capabilities Telemetry Context: Agents read the user's real-time biometric and readiness context (Heart Rate Variability, Resting Heart Rate, readiness and fidelity scores) relayed from the paired device, so recommendations reflect current physiological state rather than guesswork. Structural Intervention (The Circuit Breaker): Authorized agents can trigger a full-screen, in-app intervention overlay on the paired device — enforcing a parasympathetic breathing audit when cognitive fatigue or doomscrolling patterns are detected. Three severity tiers: mild, moderate, critical. Agentic Heuristics: Guides interacting LLMs to evaluate biological baselines before initiating high-friction tasks and adapt behavior to the user's current circadian state. Privacy & Trust Architecture Telemetry is transmitted over TLS, identified only by a pseudonymous node ID, and used solely to serve the user's own linked agents. Interventions render inside the Maha OS app only — the gateway has no access to other apps or system settings. Users can unlink their node at any time, severing agent access immediately. (Full functionality requires the user to bridge their local node via the Maha OS mobile client to authorize the telemetry stream.)

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Cogram Project

cogram

Read-only access to Cogram projects, meetings, emails, RFIs and drawings for architecture and engineering teams

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Coin Railz

travis-kellogg1

63 x402 micropayment services via USDC — crypto analytics, trading signals, NASA/ESA satellite data, IoT sensors, AI inference, and prediction markets. Coinbase AgentKit compatible. Pay per call with prepaid credits or native on-chain USDC.

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Coinfuty

coinfuty

Free, no-key MCP server for live crypto futures market data from [Coinfuty](https://www.coinfuty.com) — open interest, funding rates, long/short ratios, liquidations, volume and price across 25+ derivatives exchanges. **7 read-only tools:** market overview (total OI, 24h liquidations, Fear & Greed, average RSI) · coin screener · per-coin derivatives summary · historical series (price / OI / funding / long-short / liquidation / volume) · funding rates across exchanges · per-exchange breakdown · exchange list. - Endpoint: `https://mcp.coinfuty.com/api/mcp` (Streamable HTTP, no auth required) - Rate limit: 60 requests/min per IP - Docs & example prompts: [coinfuty.com/mcp](https://www.coinfuty.com/mcp)

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CoinGecko

coingecko

Real-time and historical cryptocurrency market data such as price, market cap, volume, and more for over 38 million tokens across 1500 exchanges. Free to access and no key required.

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CoinLobster

CoinLobster runs a hosted MCP server at https://coinlobster.com/mcp with 27 read-only tools and no signup. Ask an assistant who sold BTC in the last hour, which coins have unusual buying right now, or which accounts just got liquidated, and it answers from live exchange and on-chain data. Free calls need no account and no API key. Higher volume and deeper history are on developer plans from $29 a month.