Basis is listed as active in the registry but did not answer our last check. It exposes 41 tools.
Crypto market data, 200 indicators, order flow and a chart link. No account, no API key.
Uptime history
41 hours of history · worst hour 0%
41 hours agonow
2.2%
Uptime 24h
2 of 91 checks
41
Tools
read from the server
239 ms
Response time
average over 24h
open, no key
Access
streamable-http
What changed 4
Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 21 September 2026. No other catalogue keeps this.
21 Sep
2 tools appeared
calendar_history, news_history
21 Sep
2 tool descriptions were rewritten
chart_remove_indicator, chart_update_indicator
Basis does not always answer
Over the last week it answered 37.5% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 15 min ago.
run in your terminal
claude mcp add basis --transport http https://www.basischarts.com/api/mcp~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"basis": {
"url": "https://www.basischarts.com/api/mcp"
}
}
}~/.codex/config.toml
[mcp_servers.basis]
url = "https://www.basischarts.com/api/mcp".cursor/mcp.json
{
"mcpServers": {
"basis": {
"url": "https://www.basischarts.com/api/mcp"
}
}
}.vscode/mcp.json
{
"mcpServers": {
"basis": {
"url": "https://www.basischarts.com/api/mcp"
}
}
}Available tools 41
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
chart
chart_add_indicator
Put an indicator on the chart. studyId is an id or a common name ("ema20", "bollinger"); catalog_describe lists parameters. Omitted ones use the default. Changes the chart you are building; call chart_link when you are done so the person can open it.
chart_image
See the chart you are building: returns a PNG of it -- candles, volume, every indicator and drawing -- rendered the way Basis draws it, plus the exact figures it shows. Use it to check structure, levels and what you drew before you describe them. Build first with the chart tools, or pass symbol, timeframe, indicators and levels to build and look in one call. Pixels are for shape; quote numbers from the figures or the data tools.
chart_link
Publish the chart and get a URL the person can open in Basis. Call it at the end of any answer about a market: the chart is half the answer. Either build first with the chart tools, or pass symbol, timeframe, indicators and levels here to build and publish in one call. Give the URL as a link and say in one line what it shows. No account needed; the link lasts seven days.
chart_remove_indicator
Delete an indicator instance from the chart. Use chart_state to find its instance id. To temporarily hide it instead, use chart_toggle_indicator. Changes the chart you are building; call chart_link when you are done so the person can open it.
chart_set_instrument
Point the chart at a market. Venue and symbol as the exchange writes them, e.g. BTCUSDT on binance. This changes the chart you are building, which the person opens through chart_link.
chart_set_timeframe
Change the chart timeframe, e.g. 15m, 1h, 4h, 1d. Changes the chart you are building; call chart_link when you are done so the person can open it.
chart_set_type
Change how price is drawn — candles, heikin ashi, line, renko, footprint and others. A wrong id is refused, and the refusal lists every one that works. Changes the chart you are building; call chart_link when you are done so the person can open it.
chart_state
The chart you are building for this person: venue, symbol, timeframe, chart type, every indicator with its instance id and parameters, and every drawing. Start here when you need an instance id, and call it again after changes to confirm what landed. Finish with chart_link to give the person something to open.
chart_toggle_indicator
Hide or show an indicator without removing it — useful for comparing a chart with and without something. Changes the chart you are building; call chart_link when you are done so the person can open it.
chart_update_indicator
Edit the parameters of an existing indicator instance. First call chart_state to get its instance id; use catalog_describe for supported parameters. To delete use chart_remove_indicator, to hide/show use chart_toggle_indicator. Changes the chart you are building; call chart_link when you are done so the person can open it.
drawing
drawing_add
Draw on the chart. Points are {time, price} in chart coordinates — time in seconds, matching the candle timestamps a data handle reports. A horizontal line needs one point; a trendline or box needs two. Both numbers must be copied from a tool result — a summary's max with its maxAt, a crossing with its time — never read off your own prose or carried over from a different computation. The result echoes back what was drawn: check it against the figures you are about to quote, because a line that disagrees with the paragraph beside it is worse than no line. Changes the chart you are building; call chart_link when you are done so the person can open it.
drawing_delete
Delete a drawing. This cannot be undone — the shape is not recoverable — so the user is asked first. Changes the chart you are building; call chart_link when you are done so the person can open it.
drawing_freehand
Create one or more precise freehand strokes as a single undoable composition. A stroke accepts arbitrary chart points; line accepts two endpoints; ellipse and rectangle accept two opposite corners and are generated smoothly. Use highlighter for translucent emphasis and brush for circles, paths and marks. Changes the chart you are building; call chart_link when you are done so the person can open it.
drawing_style
Change how an existing drawing looks. Get the id from chart_state. Use it to keep several drawings apart — a measured level and a projected one should not be the same colour, and a reader has only the picture to tell them by. Changes the chart you are building; call chart_link when you are done so the person can open it.
market
market_candles
Load price history and return a handle to it, plus a summary. The bars themselves are deliberately not returned — pass the handle to the compute tools instead. Defaults to whatever is on the chart.
market_derivatives
Funding, open interest, positioning and taker flow for a loaded contract. Venues publish different subsets; anything a venue does not publish comes back as unavailable rather than zero.
market_dominance
Current crypto market-cap structure from a server-cached aggregate source: real BTC and ETH dominance, total market cap/volume, tracked stablecoin share and leading asset shares with source and timestamps. Use this for BTC.D/rotation context. This is a current snapshot, not a historical dominance backtest series.
market_relationships
Professional multi-asset relationship analysis on timestamp-aligned closed-bar log returns. Returns a correlation matrix plus rolling correlation, OLS beta/alpha, R-squared, upside/downside correlation, relative performance, one-bar lead/lag diagnostics and a rolling log-price spread z-score versus a benchmark. Use this for BTC correlation, beta, pairs and relative-strength work; price-level correlation is deliberately not reported.
news
news_detect_assets
Which crypto assets a piece of text refers to. Word-bounded, so "button" does not match TON and "operation" does not match OP.
news_history
Read archived crypto headlines, newest first, with source links. Use news_recent for live headlines. Paginate with nextBefore (ISO timestamp). Archive coverage starts when Basis began collecting; an empty page does not prove no news occurred. No full article text.
news_recent
Recent crypto headlines with an impact score and the assets each one touches. Impact is a keyword heuristic, not a judgement about the market.
position
position_calculate
Risk-first position sizing with quantity, notional, margin, effective leverage, fees, funding, breakeven, liquidation estimate, target R multiples and warnings. Use position_plan_on_chart instead when the user should see the plan on the chart.
position_draw_on_chart
The chart-only long/short position drawing tool. Draw an entry, stop and target box immediately when those price levels are known. It needs no account equity or risk percentage, performs no position sizing and places no order. Use position_plan_on_chart instead only when the user also wants quantity and risk calculations. Changes the chart you are building; call chart_link when you are done so the person can open it.
position_plan_on_chart
Calculate a risk-first long/short position and draw the entry, stop and first target directly on the live chart. The drawing retains quantity, notional, margin, costs, liquidation estimate, targets, warnings and an optional sandbox program id so later analysis reads the same plan the user sees. Changes the chart you are building; call chart_link when you are done so the person can open it.
calendar
calendar_history
Reconstruct historical calendar conventions (options expiry, CME settlement, payroll schedule). NOT an archive of confirmed releases or actual economic values. Holiday exceptions may differ. No historical funding, halving, FOMC or CPI feed. Use calendar_upcoming for future events.
calendar_upcoming
Scheduled events ahead: the next funding settlements for a contract, the Bitcoin halving projected from live block height, difficulty retargets, monthly options expiry, CME settlement and non-farm payrolls. Every row states where its date came from — live, a published rule, an estimate, or the user — because a halving projected from block arrival and an expiry fixed by convention are not equally certain. Use it before saying anything about what happens next; nothing else here looks forward. FOMC and CPI are absent on purpose: their dates are announced rather than derivable, so this does not have them.
catalog
catalog_describe
Full detail for one catalogue entry: an indicator's parameters and defaults, a formula function's signature, or a strategy's parameters. Call this before passing parameters you have not seen.
catalog_search
Search what Basis can do: indicators, formula functions, built-in strategies, the extra series available inside strategy expressions, and the drawing tools with the number of anchors each one takes. Exact counts are in the system prompt catalogue. Use this before assuming something does or does not exist — and always before drawing, because a drawing tool id you guessed is refused. Leave the query empty to list everything of a kind.
screener
screener_backtest
Historically replay a cross-sectional screen at every bar. Matching instruments form an equal-weight long or short portfolio, entered at the next bar open and held to the following bar open, then re-screened. Use this when the question is whether repeatedly trading screener matches worked — a single-symbol backtest of coins that match today is not a substitute. Costs follow actual portfolio turnover, so an unchanged holding is not charged as a fresh round trip.
screener_run
Scan the venue's listed instruments for ones matching conditions, instead of looking at the open chart. Rules combine price fields, any indicator plot, or a formula expression, with ALL/ANY matching. This is the tool for "which coins are doing X right now". It fetches history for every instrument in the universe, so it is slow and worth asking for once with the right conditions rather than repeatedly with narrower ones.
alert
alert_link
Prepare a price or indicator alert and get a link that sets it in Basis in one click. Use it whenever the person wants to be told when something happens -- a level breaks, RSI crosses 70, price moves 5%. For a price level pass price (and when, or it is chosen from the current price); for anything else pass conditions. Give the URL as a link and say in one line what it watches. Nothing is armed until they open it and confirm. No account needed; the link lasts seven days.
backtest
backtest_run
Backtest one built-in strategy with one set of parameters. Fills happen at the next bar's open and costs are charged per side. Returns risk-adjusted metrics alongside the raw return — judge on those, not on total return.
crypto
crypto_quant_guide
Domain knowledge for a crypto analysis: the constraints of the topic, the Basis tool chain, and — the part worth calling for — findings Basis has actually measured, each with its sample and verdict, plus the conventional readings it has NOT measured, marked as such. Call it before analysing a chart pattern, interpreting an indicator level, designing a strategy or judging a result that looks strong. It carries no live market data.
daytrade
daytrade_opportunity_scan
Run one symmetric long/short scan over the same top-volume universe and return rule-independent breadth, 24h liquidity semantics and ranked directional candidates. Use this first for comprehensive day-trade or scalp discovery; then deep-dive only the shortlist with derivatives/order-flow tools. A low match count is never reported as breadth.
fibonacci
fibonacci_draw
Draw a Fibonacci study directly on the chart with exact candle coordinates and optional custom ratios. Supports retracement, extension, channel, time, fan, circle, spiral, arc and wedge variants. Prefer swing timestamps/prices returned by market_candles computations rather than visual guesses. Changes the chart you are building; call chart_link when you are done so the person can open it.
formula
formula_evaluate
Evaluate a Basis formula expression over a loaded window. Functions are listed by catalog_search kind=formula; series named open, high, low, close, volume, returns and more. Multi-line with `let` bindings is supported; the last expression is the result.
hyperliquid
hyperliquid_whale_read
Read current public Hyperliquid positions for a frozen, research-screened whale cohort. Returns account-normalized consensus, participation, agreement, effective-wallet count, single-wallet concentration, liquidity and optional recent fills for the focus symbol. Use this for whale/smart-money positioning as one evidence family, never as a standalone signal.
indicator
indicator_compute
Run any indicator in the catalogue. Returns EVERY output series it has — Donchian gives three bands, MACD gives line, signal and histogram — each reduced, plus the indicator's own conventional levels so the reading can be interpreted against its actual scale. Pass a symbol to load and compute in one call, or a handle to reuse data. The forming bar is excluded unless you ask for it.
orderflow
orderflow_read
Aggressor-side order flow: buy and sell volume separated by who crossed the spread, delta, the footprint by price level, the point of control, and absorption or stacked imbalance. Measured from the venue aggressor tag, not inferred from bar direction — use it when the question is who is being aggressive, which candles cannot answer. For one candle pass candleTime, which reads exactly that bar; otherwise it reads the last `minutes`. Report coveredMinutes, not the minutes asked for.
strategy
strategy_research
Run one chronological research experiment across many built-in strategies, instruments and timeframes. Use this for broad discovery instead of many backtest_run calls — and in particular instead of testing one strategy on coin after coin, which is a search whether or not it is called one. It ranks only on a selection window, checks several subperiods, leaves an embargo, reveals held-out performance, doubles costs as a stress test, compares buy-and-hold, and corrects the selected Sharpe for every strategy/symbol/timeframe combination tried.
trade
trade_experience_retrieve
Retrieve compact historical trade analogues for the current market state. Plans are deterministic synthetic templates, while fills, stop/target ordering, MAE/MFE and outcomes are settled on later historical candles with costs. Use it to compare similar wins and failures, never as proof of an edge.
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://www.basischarts.com/api/mcp | streamable-http | answering | 193 ms | 15 min ago |
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Basis — questions
Answers built from our own checks of this server.
What can Basis do?
It exposes 41 tools, read directly from the server on our last check. Among them: alert_link, backtest_run, calendar_history, calendar_upcoming, catalog_describe, catalog_search and 35 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README.
How MCP servers expose tools in the first place →
What is Basis mostly used for?
Its tools cluster around chart, drawing and market. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.
Is Basis working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 2 of 91 checks got a reply (2.2%), average response time 239 ms. The bar chart above shows every period we have measured.
The registry lists Basis as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect Basis?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Basis need an API key?
No. Basis completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 41 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Basis?
It answers our handshake in 239 ms on average, which is faster than 63% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.