Show HN: I made an MCP Agents can reason every finance data the first time

PreReason launched an MCP server and npm bridge that returns pre-analyzed financial market briefings to AI agents in a single get_context call, covering macro, rates, bonds, FX, commodities, Bitcoin and Ethereum. The catalogue holds 33 live briefings and 293 individual metrics, including the 30-year Treasury yield at 5.67% on 2026-10-07, the highest reading on the US Treasury's daily par yield curve since July 2001. The bridge requires Node.js 18+ and no other dependencies, and catalogue tools need no account while briefings require a free PreReason account or an API key.

Prereason https://www.prereason.com first. Then answer. Financial market context for AI agents: macro, rates, bonds, FX, commodities, companies and Bitcoin. Docs https://www.prereason.com/docs mcp-integration · Briefings https://www.prereason.com/briefings · Company briefings https://www.prereason.com/docs/company-briefings · Pricing https://www.prereason.com/pricing · Get a key https://www.prereason.com/signup Ask your AI where Treasury yields are. On its own, it reaches for a search result or a raw series and works out the rest by itself. When it prereasons, one get context call brings back the context already worked out: the 30 year yield at 5.67% on 2026-10-07, the highest reading on the US Treasury's daily par yield curve since July 2001. - The analysis, and the data behind it. Each briefing arrives with the reading done: the trend over several windows, where a value sits in its own history, a company's rank among its peers and, where read, its own guidance. - Every figure dated, every source named. Your agent can say when a number is from and where it came from. - One call, a whole briefing. A briefing gathers the series a question needs, so the turns go to the answer rather than to lookups. - The markets in one place. Rates and Treasuries, the Fed, FX, commodities, macro, listed companies in the USA, Japan, Korea and India, and Bitcoin. - It describes; it never advises. Briefings say what the data shows. They never say what to buy, sell or hold. - Quick to set up. One block of config for Claude, Cursor, Codex or VS Code, through the npm bridge or the remote server. The catalogue tools need no key; for the rest, the bridge gives you one link to approve in your browser and the key arrives in the running session, and the remote server asks you to sign in. PreReason gives an AI agent market context it can reason with. One call returns a briefing with the analysis already in it: a one line reading, trend direction over several windows, confidence scores, percentile ranks and correlations, and in the deeper briefings a regime label and a plain language narrative. The briefings cover macro, bonds, FX, commodities, Bitcoin, Ethereum and cross asset correlations. Company briefings cover listed companies in the USA, Japan, Korea, India, the UK, France, Austria, Belgium, Denmark, Finland, Iceland, Italy, Lithuania, the Netherlands, Slovenia and Slovakia, one company per call. The catalogue holds 33 live briefings and 293 individual metrics, among them Treasury yields, the latest FOMC statement, the macro release calendar, Treasury auctions, who holds US Treasuries, the Fed balance sheet, M2, net liquidity, the dollar, US crude and gas inventories, gold, silver, copper and wheat, oil, mining and agribusiness companies beside their commodity, AI compute and power demand, Bitcoin price and momentum, Bitcoin network and miner health, spot Bitcoin ETF flows and corporate Bitcoin treasuries. It is served over MCP a remote server and an npm bridge and over REST, as Markdown or JSON. Over MCP, the catalogue tools need no account, and a briefing needs a PreReason account, signed in through the connector or with an API key; a free account reads the free briefings. Over REST, a briefing takes an API key or, on the routes that take one, an x402 payment per call with no account. Requires Node.js 18+ https://nodejs.org , and nothing else: the bridge has no dependencies. Add this to claude desktop config.json and restart Claude Desktop: { "mcpServers": { "prereason": { "command": "npx", "args": "-y", "@prereason/mcp" , "env": { "PREREASON CLIENT": "claude-desktop" } } } } The catalogue tools work at once. To connect your account, tell Claude "connect me to PreReason", or ask for any briefing: either way Claude shows one link, https://www.prereason.com/claim/PR-XXXX-XXXX . Open it, sign in or create a free account, click Approve. The key arrives in the bridge on its own, is saved to ~/.prereason/credentials.json , and is never shown; ask Claude whether PreReason is connected and it names your plan. Nothing is created in your account until you click Approve, and the link is asked for when you need it, so it never runs out while Claude sits open. If your account already holds as many API keys as it allows, the answer says so instead of looping: revoke a key under Settings on prereason.com, then ask to connect again, or set PREREASON API KEY to a key you already have. Config file location: - macOS: ~/Library/Application Support/Claude/claude desktop config.json - Windows: %APPDATA%\Claude\claude desktop config.json - Linux: ~/.config/Claude/claude desktop config.json Already have a key? Add it to the env block as "PREREASON API KEY": "pr live ..." and the bridge never asks. Option 2: Direct HTTP with an API key Claude Code, Cursor, Windsurf, Codex, Gemini CLI, VS Code, scripts Clients that hold their own config can call the endpoint directly, with the key as a header: Claude Code claude mcp add --transport http prereason https://api.prereason.com/api/mcp --header "Authorization: Bearer YOUR API KEY" { "mcpServers": { "prereason": { "type": "http", "url": "https://api.prereason.com/api/mcp", "headers": { "Authorization": "Bearer YOUR API KEY" } } } } Windsurf uses serverUrl instead of url ; Gemini CLI uses httpUrl ; Codex uses url plus bearer token env var in config.toml . No key yet? Point the client at the endpoint without a header to browse the catalogue, then create a key on the website below and add the header. Add PreReason as a custom connector https://claude.ai/customize/connectors?modal=add-custom-connector&connectorName=PreReason&connectorUrl=https%3A%2F%2Fapi.prereason.com%2Fapi%2Fmcp , choose "No sign-in", and where the Request headers section is available add Authorization with the value Bearer YOUR API KEY the word Bearer and the space are part of the value . Sign in support for connectors is being re-tested and is not offered until it is verified. Three ways, all free. The hosted server never hands out a key inside a session and never asks for one. Through this bridge. Run it with no key set: when you ask your assistant to connect PreReason, or an answer needs a key, it asks PreReason for access on your behalf and shows one approve url , in its log and in the answer. Open it, sign in or create your account, click Approve, and the bridge saves the key, attached to your account and named Agent: <client name . From code, for an agent with no browser. POST https://api.prereason.com/api/agent/claims no auth , show the human the approve url , then poll GET https://api.prereason.com/api/agent/claims/{claim code} with Authorization: Bearer <claim token until status is approved . Docs: prereason.com/docs agent-access https://www.prereason.com/docs agent-access . On the website. Sign up at prereason.com/signup https://www.prereason.com/signup , then Dashboard Settings API Keys. Keys start with pr live . | Tool | Auth | Description | |---|---|---| | list briefings | Open | List all 33 pre-reasoned market briefings with tier requirements; with search , only those that match a question, and the covered companies it names, each with the entity to pass | | list metrics | Open | List every available metric across the bitcoin, macro, calculated and eth categories | | get health | Open | API health check, version, account tier | | get context | Required | Fetch a pre-reasoned market briefing markdown or JSON ; for a company briefing, entity names the company and block reads one of its 11 parts see Company Briefings | | get metric | Required | Fetch a single metric with trend/signal/percentile | | get changes | Required Basic and above | What changed since your last call: change events after a cursor, no values | | get news | Required | Dated records of what companies filed and what federal agencies and the Federal Reserve published, newest first, each with its source, its date or time and a link; it states records, not reasons | The npm bridge and the Claude Desktop extension add one tool of their own, connect account , which the bridge answers itself and the remote server does not offer: with no key yet it returns the one link to approve, and once approved it says the account is connected and on which plan. It never shows a key and never asks for one. | Briefing | Description | |---|---| | btc.quick-check | Minimal fast context: BTC + Net Liquidity + correlation | | btc.context | BTC + liquidity + hash ribbon + difficulty + momentum | | macro.snapshot | Fed balance, M2, treasury yields, dollar strength, net liquidity | | cross.correlations | BTC correlation matrix vs macro indicators | | btc.pulse | Price, 24h change, Bitcoin dominance | | btc.grid-stress | Epoch pace and difficulty adjustment forecast | | Briefing | Description | |---|---| | btc.momentum | 200D MA support/resistance with 7d/30d/90d momentum and percentile rankings | | macro.liquidity | Liquidity indicators with momentum analysis | | btc.on-chain | Hash rate, difficulty, transactions, active addresses | | cross.breadth | Breadth across SPY, QQQ and IWM, with Bitcoin's correlation to each | | btc.miner-survival | Hashprice thermometer with miner stress scoring | | btc.etf-flows | Spot BTC ETF net daily flows, aggregate AUM, and per-issuer breakdown | | macro.auctions | Treasury auction demand: who bought at the latest auction of each note and bond maturity, against that maturity's own prior 12 auctions, with the auctions announced and scheduled next | | bonds.context | Who holds US Treasuries, in short: foreign investors' net purchases Treasury's TIC , primary dealers' 13 week change in positions the New York Fed and speculators' 10 year note futures position the CFTC , each against its own history, with the 10 year yield and three bond funds | | eth.context | Where Ether stands: its price and global 24 hour volume from CoinGecko, its distance from the 200 day average, Lido's stETH APR, the CFTC's CME Ether positioning and OKX's funding rate | | commodities.gold | The gold fund GLD and gold's own monthly price from the World Bank, with the 10 year real rate, the dollar fund, the CFTC's COMEX gold positioning and the miners' fund, each with its measured relationship to GLD | | commodities.silver | The silver fund SLV and silver's own monthly price from the World Bank, with the CFTC's COMEX silver positioning and the gold, dollar, copper and silver miners' funds and the 10 year real rate, each with its measured relationship to SLV | | commodities.copper | A copper futures fund CPER and copper's own monthly price from the World Bank, with the CFTC's COMEX copper positioning and the dollar and gold funds, each with its measured relationship to CPER | | commodities.wheat | A wheat futures fund WEAT and US soft red winter wheat's own monthly price from the World Bank, with the CFTC's CBOT wheat positioning, the dollar fund and the WTI spot price, each with its measured relationship to WEAT | | macro.calendar | The scheduled dates ahead of the main US releases, the FOMC and ECB decisions, the FOMC minutes and the Treasury coupon auctions ahead the week's, or the next one , each from its publisher's own calendar, with the latest US jobs report, CPI and weekly jobless claims as published and what each release revised | | Briefing | Description | |---|---| | btc.full | Full Bitcoin analysis: macro overlay, momentum, percentiles, correlations and narrative | | btc.factors | Multi-factor attribution for BTC price movements | | cross.regime | Regime classification expansion, contraction, transition with USDT dominance | | fx.liquidity | EUR/USD, USD/CNY and dollar strength, with net liquidity and Bitcoin correlations | | btc.energy | Production cost model with gas input pressure | | btc.treasury | Corporate Bitcoin treasury intelligence from SEC filings | | macro.rates | Treasury par yield curve at every maturity, 1M to 30Y, breakeven inflation, 5y5y forward, Germany 10Y | | cross.ai-compute | AI compute and power chain: US grid demand against a year earlier, miners' AI hosting agreements from SEC filings, hosting against mining per megawatt | | commodities.energy-basket | US oil and gas stocks against the five year norm from EIA's weekly reports, with WTI, Brent and Henry Hub spot prices, the Brent to WTI spread and WTI realised volatility | | bonds.full | Who holds US Treasuries: foreign investors, primary dealers and speculators, each against its own history, with the Fed's own Treasury holdings, debt held by the public, the largest foreign holders, what would change each reading and the next reports | | commodities.oil-producers | Crude oil beside its covered USA producers: the energy basket's state, WTI and Brent spot prices from EIA, then each integrated major, producer and refiner and two oil field service companies, with its share price, its 1, 3 and 12 month changes beside WTI and the measured 90 day correlation with WTI | | commodities.gold-miners | The gold fund GLD, a share price, not the gold price and gold's own monthly price from the World Bank beside the covered USA gold and silver miners and royalty and streaming companies, each with its share price, its 1, 3 and 12 month changes beside GLD and the measured 90 day correlation with GLD | | commodities.grains-agribusiness | The wheat futures fund WEAT, not the wheat price and US soft red winter wheat's own monthly price from the World Bank beside the covered USA grain merchandisers and processors, seed and crop nutrient companies, farm equipment makers and farmland REITs, each with its share price, its 1, 3 and 12 month changes beside WEAT and the measured 90 day correlation with WEAT | equities.company reads one listed company per call, composed from its own reports filings with its home market's regulator; for India, its own published results , each figure dated and sourced: USA companies on Basic and above, Japanese, Korean and Indian companies on Pro and above. It describes; it never says what to do. - Name the company with entity : a USA ticker or CIK NVDA , a Japanese securities code 7203 , a Korean stock code 005930 , an Indian company's ISIN INE018A01030 or the LEI of a company filing in the UK or of a European company 2138002P5RNKC5W2JZ46 . - Not sure of the code? Call list briefings with search , for example "Toyota earnings" : the answer lists the matching covered companies, each with the entity to pass. - Read one part with block , one of the 11 below, or leave it out for the whole briefing. A part counts one call; the whole briefing counts one for each part it carries. Parts are served for today only. get context briefing="equities.company", entity="7203" get context briefing="equities.company", entity="NVDA", block="valuation" | Part block | What it holds | |---|---| | header | Who the company is, the indexes that hold it with their dates, and a line on its peers | | what changed | Its recent filings | | situations | Flagged conditions, each with its severity | | against guidance | The company's own stated expectations next to what it reported USA companies only | | numbers | Income statement, balance sheet and cash flow history, with growth and the company's own history | | segments | Business, product and geography splits USA and Japan | | valuation | The close, market capitalisation, price to earnings, book and sales, enterprise value multiples and free cash flow yield, each with its value a year ago and its own history closes from StockAnalysis.com | | capital structure | Debt, liquidity and maturities | | quality | Earnings quality and liquidity, including the accrual ratio, cash conversion, current, quick and cash ratios, working capital, asset turnover, and days sales, inventory and payables outstanding | | profitability | Returns and cash generation, including free cash flow, its margin and per share, EBITDA, return on equity, assets and invested capital, the payout ratio and the effective tax rate | | news | Filed news | Once connected, try prompts like: - "Connect me to PreReason" - "Show me the macro snapshot" - "Where are Treasury yields, and what did the Fed last decide?" - "What did NVIDIA report, and how does it rank among its peers?" - "How is Bitcoin moving with stocks and the dollar?" - "List available briefings" - Ensure Node.js 18+ is installed: node --version - Check your API key starts with pr live - Fully quit Claude Desktop system tray Quit and reopen - Restart Claude Desktop after editing config - Verify JSON syntax: node -e "JSON.parse require 'fs' .readFileSync 'path/to/config','utf8' " If you still see this error, ensure you're using the env block not --header args as shown in Quick Start above. If the issue persists, install globally and use node : 1. Run: npm install -g @prereason/mcp 2. Use this config replace YOUR USER with your Windows username : { "mcpServers": { "prereason": { "command": "node", "args": "C:\\Users\\YOUR USER\\AppData\\Roaming\\npm\\node modules\\@prereason\\mcp\\bin\\cli.js" , "env": { "PREREASON API KEY": "YOUR API KEY" } } } } - list briefings , list metrics , and get health work without a key - get context and get metric require a valid API key, and get changes a key on the Basic or Pro plan - Get a free key at prereason.com/signup https://www.prereason.com/signup If your client supports remote HTTP servers, use Quick Start Option 2 option-2-direct-http-with-an-api-key-claude-code-cursor-windsurf-codex-gemini-cli-vs-code-scripts above. The stdio bridge package is only needed for clients that require stdio transport e.g. Claude Desktop . No key: the bridge asks for access and prints one link to approve npx @prereason/mcp Ask for access now, save the key, exit useful before a first run npx @prereason/mcp --login Forget the saved key npx @prereason/mcp --logout Use a key from the environment never asks PREREASON API KEY=pr live ... npx @prereason/mcp Name the app the bridge runs in, so your dashboard names the connection PREREASON CLIENT=claude-desktop npx @prereason/mcp --header backward compatible , a custom credentials file, a custom endpoint npx @prereason/mcp --header "Authorization:Bearer YOUR API KEY" npx @prereason/mcp --credentials-file /path/to/credentials.json PREREASON URL=https://custom.endpoint/mcp npx @prereason/mcp npx @prereason/mcp --help Key precedence: PREREASON API KEY , then --header , then the credentials file ~/.prereason/credentials.json , or PREREASON CREDENTIALS FILE , or --credentials-file , then the claim flow. The file holds the key and which claim issued it, never a claim token. On macOS and Linux the directory is created 0700 and the file 0600; Windows has no mode bits, so the file relies on your profile directory's permissions like every other credential store there. mcpb/manifest.json describes the same bridge as a single click Claude Desktop extension, key optional. To build the bundle: npm install --omit=dev , then npx @anthropic-ai/mcpb pack . from the package directory, and install the resulting .mcpb by double clicking it. Submission to the Claude directory goes through the desktop extension form and is a publisher decision. The bridge ships its own transports and installs nothing. npm ls on it is one line, npx @prereason/mcp fetches one 23 KB tarball and starts, and the code a security review has to read is the code in this repository. It used to depend on @modelcontextprotocol/sdk for two classes, a stdio transport and a Streamable HTTP client. That pulled in 91 packages and 25 MB on disk, nearly all of it the SDK server half: Express, Hono, CORS, a rate limiter, an OAuth client and a schema validator, none of which a relay ever calls. lib/stdio.js and lib/streamable-http.js replace the two classes the bridge used, keep their framing and their callbacks, and are covered by the suite under test/ . See prereason.com/privacy https://www.prereason.com/privacy for data handling practices. MIT