MCP HeartbeatTHE MCP OBSERVATORY
Public workspace

Explore

Evidence for your next connection.

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

Read-only probes

MCP server · Code & DevOps

AstraNL

Dutch construction facts with measured accuracy + NL coordination. Never holds third-party funds.

Checks passed
12 / 22

2 failed · 8 not measured

Median response
227 ms

Median of successful probes over 7 days

30-day uptime
Not measured

Share of countable probes over 30 days, including daily rollups. Auth challenges are excluded.

Discovered tools
36

Tool definitions returned by this server

Independent monitoring

Health & checks

Status history

Responded

The server completed its last measured handshake. This is an observation, not a guarantee.

Last checked
Check summary by test group
Test areaPassedFailedUnmeasured
ConnectionCan a client connect and discover tools?
500
Reliability & speedDoes it respond consistently and quickly?
004
Access & authenticationWhat is required to use this server?
102
Tool qualityAre the tool definitions usable by an agent?
310
Publisher identityCan the publisher be traced to its source?
312

Unmeasured means there is not enough evidence to decide. How these checks work

Inspect individual checks 22 recorded

Core

  • Pass
    Reachable

    Latest probe returned HTTP 200 in 227 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name astranl-mcp.

  • Pass
    Lists tools

    tools/list returned 36 tools.

  • Pass
    Current protocol

    Negotiated 2025-11-25. The bar is 2025-06-18 or newer.

  • Pass
    HTTPS

    The endpoint URL is https.

Performance

  • Not measured
    Fast (p50)

    Median latency 227 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 227 ms over 1 samples in 7 days. The bar is 3000 ms. Need at least 20 samples.

  • Not measured
    Reliable (uptime)

    1 of 1 attempts returned a tool list in 30 days (100%). The bar is 99%. Need at least 30 samples.

  • Not measured
    Stable tool list

    Fewer than two successful probes in 30 days, so tool-list stability is not measured.

Access

  • Pass
    Open access

    tools/list succeeded with no credential, and the record declares none.

  • Not measured
    Standard auth

    Auth is not required, so the OAuth metadata check does not apply.

  • Not measured
    Free tier cited

    No publisher quote has been checked.

Tools

  • Pass
    Tools described

    Every tool description is at least 20 characters.

  • Pass
    Valid input schemas

    Every inputSchema is a JSON Schema object.

  • Fail
    Parameters documented

    53 of 97 parameters have a description (55%). The bar is 80%.

  • Pass
    Safety hints

    Every tool sets readOnlyHint or destructiveHint.

Publisher

  • Pass
    Verified namespace

    Listed in the Official MCP Registry.

  • Pass
    Website matches publisher

    The website host matches the reverse-domain namespace.

  • Fail
    Source repo linked

    No repository URL is on file.

  • Not measured
    Repo owner matches

    This namespace is not an io.github login, so the owner comparison does not apply.

  • Pass
    Recently updated

    Updated 2026-10-24T00:46:43.508625Z, within 180 days.

  • Not measured
    Open-source licence

    No GitHub repository to ask about a licence.

Start using AstraNL

Connect to this server

Choose your client, copy the configuration, then enable the server in your client’s MCP settings.

Run this command in your terminal, then restart Claude Code.

Claude Code

claude mcp add --transport http astranl https://astranl.com/mcp/streamable

Capabilities

Tools 36

ask_astranl

Turn a real-world task or question into a routing decision: whether AstraNL can help, which one tool to call, what to supply, what can and cannot be verified. No commitment, nothing created, no key. Also answers whether a physical task is feasible in the Netherlands.

Discovered
check_counterparty_nl

Check a Dutch or EU counterparty against official sources before your own next step, such as onboarding a supplier, paying an invoice or signing an order. Give the KvK number, the company name and the EU VAT number as your document states them. Returns verdicts, not register data: whether the KvK number has an active registration, whether the name matches a registered name, whether the VAT number is valid in VIES and whether its VIES name matches the register, EU sanctions list candidates, whether an insolvency case is published under the KvK number in the Dutch insolvency register, open questions and a check_id. Read-only, no key, no cost. AstraNL does not search the Dutch register by name; look a number up at kvk.nl. When a colleague or auditor must verify it later, call record_counterparty_check with the check_id. It does not prove who may sign for the company, who owns a bank account, solvency or reliability.

Discovered
check_estimate_materials

Check every material line of an AstraNL estimate case you hold the token of (from estimate_case_create) against the current offer of the same product: PRICE_UP or PRICE_DOWN beyond 5 percent, UNAVAILABLE, NOT_FOUND_IN_CHECKED_SOURCES, CHEAPER_SAME_GTIN at another store, each with source and read time, plus the open findings of the daily monitor for that case. Read-only; an estimate is re-read live at most once in 6 hours.

Discovered
check_material

Check one building material in live Dutch store reality with ONE read-only call. Exact identity only: a GTIN with valid check digit, a store variant or the exact partner feed link; plain words return candidates you can check exactly next. Returns every offer of the same trade item with price incl. VAT, stock and read time per store (Bouwmaat, Hubo, Houtdirect through UCP search; partner shop feeds), the identical GTIN at other stores (verdict DIRECT_SUBSTITUTE, the only substitute named), the cheapest available offer, per source status and a sha256 digest. Limits: seller prices at read time, not a quote or delivery promise; delivery costs not included; NOT_FOUND covers only the sources listed. Never orders, pays or contacts anyone.

Discovered
check_task

Current state of a task or ingress receipt from create_task, and who must act next. Returns only what is recorded; infers nothing.

Discovered
commitment_attest

Issue a certificate recording the fact of an agreement only. AstraNL holds no money, guarantees no performance and is not a party. Submit only an agreement the parties have actually made and authorized you to record. The connector sets created_by; it is not a caller field. The JSON request must be at most 25000 bytes.

Discovered
commitment_verify

Verify an agreement certificate by ID, up to 40 characters. Returns the verification service verdict unchanged. A genuine certificate does not guarantee performance.

Discovered
construction_economy

CBS construction economy: build cost input price index, construction bankruptcies, construction vacancy rate (latest stored period, CBS status Voorlopig/Definitief per row, freshness) plus CBS indicators (dwelling permits, establishments, labour). Provisional figures are revised by CBS. Read-only. Every answer carries source provenance (source, source_url, licence, as_of, retrieved_at = when AstraNL last read the source, served_at, method, status) and an exposure block.

Discovered
construction_events

CloudEvents 1.0 feed of construction signals, oldest first after since_id: daily permit aggregate cells (with gate B accuracy), newly published works tenders (AAO), laws coming up. Continue with next_since_id. Permit aggregates only: no permit rows, publication identifiers, titles, addresses, points or names; permit counts below 5 per authority per kind are shown as <5 and totals that would reveal one are lower bounds (>=n). Read-only. Every answer carries source provenance (source, source_url, licence, as_of, retrieved_at = when AstraNL last read the source, served_at, method, status) and an exposure block.

Discovered
construction_laws

Construction law calendar: dated rules in force or planned (Omgevingswet, Wkb, EPBD IV, MPG, CPR, ...), each with its own official or sector source and last-verified date; rows whose planned date passed are flagged needs_reverify. Read-only. Every answer carries source provenance (source, source_url, licence, as_of, retrieved_at = when AstraNL last read the source, served_at, method, status) and an exposure block.

Discovered
construction_leadtimes

Permit lead times (application to decision, median and quartiles) from official pairs. Currently CLOSED: the answer says CLOSED with the reason until validation gate C passes; no lead time is estimated before that. Permit aggregates only: no permit rows, publication identifiers, titles, addresses, points or names; permit counts below 5 per authority per kind are shown as <5 and totals that would reveal one are lower bounds (>=n). Read-only. Every answer carries source provenance (source, source_url, licence, as_of, retrieved_at = when AstraNL last read the source, served_at, method, status) and an exposure block.

Discovered
construction_natura

Natura 2000 sites in the Netherlands from RVO / PDOK: number, site label, protection type, status, site code, bounding box (lon/lat). Filter with site. Source recount is reported. Read-only. Every answer carries source provenance (source, source_url, licence, as_of, retrieved_at = when AstraNL last read the source, served_at, method, status) and an exposure block.

Discovered
construction_permits

Official permit publications counted per issuing body (municipality, province, water board) and kind (application, granted, refused, ...) over the last N days (default 90, max 400). Permit kind accuracy is measured, not assumed: manual validation gate B on a 200-row sample (2026-10-05) gave precision 0.98, Wilson 95% lower bound 0.94, 11% unclassified; the current figures come back in accuracy, and the unknown bucket (OVERIG, BESLUIT_ONBEKEND) is shown separately. Permit aggregates only: no permit rows, publication identifiers, titles, addresses, points or names; permit counts below 5 per authority per kind are shown as <5 and totals that would reveal one are lower bounds (>=n). Read-only. Every answer carries source provenance (source, source_url, licence, as_of, retrieved_at = when AstraNL last read the source, served_at, method, status) and an exposure block.

Discovered
construction_summary

One-call overview of Dutch construction facts: permit publications last 90 days (national), lead-time status, number of open public works tenders, latest CBS periods, construction laws taking effect in the next 365 days. Permit kind accuracy is measured, not assumed: manual validation gate B on a 200-row sample (2026-10-05) gave precision 0.98, Wilson 95% lower bound 0.94, 11% unclassified; the current figures come back in accuracy, and the unknown bucket (OVERIG, BESLUIT_ONBEKEND) is shown separately. Permit aggregates only: no permit rows, publication identifiers, titles, addresses, points or names; permit counts below 5 per authority per kind are shown as <5 and totals that would reveal one are lower bounds (>=n). Read-only. Every answer carries source provenance (source, source_url, licence, as_of, retrieved_at = when AstraNL last read the source, served_at, method, status) and an exposure block.

Discovered
construction_tenders

Open Dutch public works tenders from TenderNed (announcements with a future closing date): buyer, CPV, procedure, published and closing date, days left, European flag, TenderNed id and link. Tender names are not returned; open the link for the full notice. Read-only. Every answer carries source provenance (source, source_url, licence, as_of, retrieved_at = when AstraNL last read the source, served_at, method, status) and an exposure block.

Discovered
construction_zones

Dutch zero-emission and low-emission zones from NDW as published: municipality, zone label, status, start, vehicle categories, transition rules, bbox centre; derived_ze_logistics is derived by AstraNL. Source recount (ids and hashes) is reported. Read-only. Every answer carries source provenance (source, source_url, licence, as_of, retrieved_at = when AstraNL last read the source, served_at, method, status) and an exposure block.

Discovered
create_task

Ask AstraNL to find and coordinate a verified executor for a physical task in the Netherlands. Returns an ingress receipt at once and a case once planning found a path; the client pays the executor directly; AstraNL holds no money. Fee: submitting costs nothing; AstraNL charges 1 percent of the transaction only when it coordinated a completed paid task, nothing else.

Discovered
estimate_case_answer

Submit human answers as a map from question ID to text. The public router validates, merges and queues an operator rerun; submission does not itself spawn processing. Requires the case token.

Discovered
estimate_case_create

Create a real estimate case through the public router. Reuses the connection X-Agent-Key (get one free with POST https://astranl.com/api/agents/register; the api_key is shown once; send it as the X-Agent-Key header of the MCP connection); requester_kind is agent. Save case_id and token securely. language selects human-client output, default nl. Duplicates do not return a token. Processing may be asynchronous.

Discovered
estimate_case_files

Upload photos or plans as base64 contents, never local paths or URLs. Requires the case token. Public feature flag, type checks, sanitization and quotas apply: 10 files, 15 MiB each, 60 MiB per case. Upload acceptance does not prove incorporation into an existing estimate.

Discovered
estimate_case_status

Read the exact public case-status JSON using case_id and its token. Human-client questions and documents retain their language. Deliver an estimate only when release_state is RELEASED; DONE alone is insufficient.

Discovered
estimate_case_video

Video action=create takes one base64 file up to 250 MiB and reuses the connection agent key (X-Agent-Key header of the MCP connection; get one free with POST https://astranl.com/api/agents/register). action=status takes intake_id and its token only. After case creation, use case_id and case_token with estimate_case_status. Video and case tokens are distinct.

Discovered
estimate_cost

Instant planning cost figure in EUR for one job category in the Netherlands (not a quote; answers in under 2 s). labor_cost = labor_hours x labor_rate x location_mult, always. The rate comes from AstraNL's S_PRICEBASE (CAO wage with employer cost, overhead and profit) or its labour cost canon; hours from CBS-derived norms where AstraNL has one, otherwise a planning factor labelled ASSUMPTION; location_mult is 1.0 with its basis (no sourced regional factor for renovation labour). Each material line says price_source live_read (store, read_at, product link) or indicative (basis and date). No robot price or savings is given without evidence. Sources are in estimate.labour and estimate.materials. For a reviewed estimate of a real job use estimate_case_create, then estimate_case_status and estimate_case_answer; estimate_case_files for photos or plans and estimate_case_video for video intake. Read-only, free.

Discovered
fetch

Fetch the full record for a single result id returned by search (robot passport, category detail, or merchant SKU). Read-only. Id exchange:board returns the AstraNL exchange: verified supply and demand records with landed cost, 1 percent fee after confirmed delivery, terms sealed before execution, and how to post.

Discovered
get_evidence

Machine-checkable evidence for an AstraNL task, action or receipt: the signed log events that mention it, each verified live, with a proof block stating what is verified, what is not, validity, status, limitations and next actions.

Discovered
ground_astranl

Get compact, source-linked real-world context for an LLM in ONE read-only call. Searches AstraNL public materials or tender records, or its protocol identity. Use source=public_tenders for tenders, materials for products; auto keeps domains separate. Returns record update times, fresh/stale/unknown labels, record disagreements, coverage gaps and ready-to-use context_text. Never books, contacts or pays anyone. Not a general web search: no match is not proof of absence; a cached price is not a quote. Optional astranl.reality-link.v2 profile checks exact source-record claims. It does not promote registry records to independently verified real-world facts. official.deadline on tender:TED-* records is checked live at the EU publisher (TED), budgeted and cached; unavailable means UNKNOWN.

Discovered
ground_citation

Check one scientific reference before you reuse or cite it, with ONE call. Give a DOI. AstraNL reads the Crossref work record and every Crossref notice that updates it, the OpenAlex retraction flag and the Europe PMC publication types and retraction, erratum and concern links, and returns a status: RETRACTION_NOTICE_FOUND, EXPRESSION_OF_CONCERN_FOUND, CORRECTION_NOTICE_FOUND, NO_NOTICE_IN_CHECKED_SOURCES or NOT_FOUND_IN_CHECKED_SOURCES, with each notice DOI, type and date, the source URLs and the observation time. Every fresh answer carries a SHA-256 digest sealed with the AstraNL moment seal and an AstraLock event id you can check later with verify_astranl. Limits: registry data at the observed time, never a judgement of the science; NO_NOTICE_IN_CHECKED_SOURCES means only these three registries; answers are cached for 24 hours. Never contacts authors or publishers. Writes (why the tool is not read-only): each fresh answer, not one served from the 24 hour cache, appends one event to the public AstraLock log with the DOI, the digest and the status, so the answer can be verified later, and stores the answer in an AstraNL database table (citation_groundings) that serves the cache and counts the budget; the row names only the door (mcp), nothing about the caller. Live budget: 300 fresh reads a day across all MCP callers; after that only cached answers, status DAILY_LIVE_BUDGET_SPENT. Logging: every MCP call is journaled with the tool name, outcome, argument length, caller class (external, probe, crawler, self), a SHA-256 hash of the caller network /24 and the client family; for demand statistics also the first 160 characters of a query, question, title or id argument and the user-agent; never the address itself, other arguments or an account.

Discovered
ground_component

Ground a machine, robot or industrial automation component in live market reality with ONE call. Give a manufacturer part number and optionally the maker. AstraNL queries its verified distributor connections (Nexar/Octopart, Mouser, element14/Farnell NL, OEMsecrets) in parallel, keeps only offers whose part number matches exactly after normalisation, screens maker and sellers against the EU consolidated sanctions list and the US Consolidated Screening List, and returns availability, stock seen, authorized sellers, lowest unit price seen in EUR, lifecycle values and per-source status. When AstraNL holds the manufacturer own lifecycle or discontinuation page for the part, the answer also carries manufacturer_lifecycle: status, date, the successor the manufacturer names and the page SHA-256, kept separate from seller-reported values; asking for a successor also shows which discontinued part it replaces. Every fresh answer carries a SHA-256 digest sealed with the AstraNL moment seal and an AstraLock event id you can check later with verify_astranl. Limits: distributor data is seller-reported at the observed time, not a quote and not a delivery promise; NOT_FOUND_IN_CHECKED_SOURCES means only these sources; answers are cached for 24 hours. Never orders, contacts or pays anyone. Writes (why the tool is not read-only): each fresh answer, not one served from the 24 hour cache, appends one event to the public AstraLock log with the part number, the maker, the digest, the availability and the number of exact offers, so the answer can be verified later, and stores the answer in an AstraNL database table (component_groundings) that serves the cache and counts the budget; the row names only the door (mcp), nothing about the caller. Live budget: 40 fresh reads a day across all MCP callers; after that only cached answers, status DAILY_LIVE_BUDGET_SPENT. Logging: every MCP call is journaled with the tool name, outcome, argument length, caller class (external, probe, crawler, self), a SHA-256 hash of the caller network /24 and the client family; for demand statistics also the first 160 characters of a query, question, title or id argument and the user-agent; never the address itself, other arguments or an account.

Discovered
housing_need

Register a real person's housing need. A real person must have asked for this submission and agreed to it and to sharing the necessary personal data with AstraNL. Never use this tool for test or synthetic data. Include only necessary information about the housing problem and the person to contact. Contacts are separated from free text and kept only for this case, without enrichment. Returns a durable receipt, not a promise of processing or resolution. Set real_person and consent to true only when both statements are true.

Discovered
machines_search

Find machines and robots suggested for a task. Read-only search: does not claim, reserve, acquire, buy or pay for anything. Results describe the registry suggestions, not guaranteed availability.

Discovered
market_indicators

Read market indicators with latest values, source dates, expected_in_5_days and measured backtest error where available. Optionally select one exact indicator key. Missing snapshots return unavailable; absent values are never invented. Forecasts are not guarantees.

Discovered
nl_municipal_build_rules

Dutch municipal rules for a renovation or building job, with ONE read-only call. Give a municipality, optionally the planned bouwkosten excluding VAT. Returns the 2026 omgevingsvergunning fee, leges, for the technical building activity as the municipality's own regulation sets it, and whether a skip or container on the public road needs a permit, a notification or nothing, with the permit fee and precario where confirmed. Every answer names the regulation, article and source URL, the read date and how it was verified. Coverage: all 342 municipalities for leges, 296 for containers. Limits: the municipality decides; spatial or other permit parts are not added; a fee is withheld when the tariff is not verified. Free, no auth, no side effects.

Discovered
order_materials

Turn an AstraNL estimate into draft purchase lists for a project, one list per store and wave, and hand them to the project administrator. Needs the project agent key (agk_...) as X-Agent-Key on the connection; the estimate tools use the connection key, so use a separate connection. Read-only actions: me, case, estimate_links, list, order_status (reads an existing order record, it never places one). Actions that write: import_estimate (creates draft lists) and finish_list (sends one draft for approval). Required fields by action: me: none; case: project_id; import_estimate: project_id, estimate_case_id, estimate_token, idempotency_key; estimate_links: project_id; list: project_id, list_id; finish_list: project_id, list_id, list_revision, version, idempotency_key; order_status: project_id, order_id. Typical order: import_estimate, then list for each list_id, then finish_list with the revision and version read. The estimate must be RELEASED after review and must carry a material order plan, otherwise import_estimate answers a failure and writes nothing. If a write answers outcome_unknown, repeat the same call with the SAME idempotency_key; never use a new key. A project administrator approves the exact list. Nothing is ordered, approved or paid by this tool. A 202 means accepted for work, not completed.

Discovered
record_counterparty_check

Make a result of check_counterparty_nl verifiable by others: records its digest in the AstraNL signed public log and returns a reference that a colleague, approver or auditor can check later with verify_astranl, without trusting AstraNL. Works only for a check AstraNL produced in the last 48 hours. The public record holds no name, number or address of the checked party. Calling it again returns the same reference.

Discovered
search

Search AstraNL coordination data (robots registry, service categories, and merchant parts by keyword). Returns a list of results, each with an id and a short title/snippet, for use with the fetch tool. Read-only. This is the generic discovery entry point expected by agent frameworks.

Discovered
verify_astranl

Verify any AstraNL reference without a key. Returns two separate layers: integrity (payload hash, Ed25519 signature, Merkle inclusion, recomputed live) and claim (what exactly is attested, by whom, from which source, when, under which method, with which validity limits and current status VALID/EXPIRED/REVOKED/UNKNOWN). Integrity never implies the claim is true for your purpose; you apply your own acceptance rules. Tells you when to re-verify and how to consume a VALID receipt for a next action. Read-only, deterministic, no model in the path.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected227 ms36