Spec Driven Development
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Description from the maker (original English)
Discover, rate and compare APIs and providers in the APIs.io catalog; manage a listing you own.
These three are never merged into one score: opinions, measurements and popularity are different things.
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
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Works in Claude on the web, desktop and mobile:
https://apis.io/mcpRun this in your terminal
claude mcp add --transport http apis-io https://apis.io/mcpPaste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"apis-io": {
"url": "https://apis.io/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Paste into .vscode/mcp.json in your project
{
"servers": {
"apis-io": {
"type": "http",
"url": "https://apis.io/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
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https://apis.io/mcpMenu names can differ slightly by plan and over time.
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These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
Tool names and descriptions exactly as the server reported them on Nov 9, 2026. The maker wrote them, not us; we show them as plain text.
apis_io_searchSTART HERE. Federated overview of the APIs.io catalog for a query: the top matching APIs, providers, AND tags in one call, each with its total match count. Filter by tags, artifact types, industry, region, rating band. `limit` is per section. To page/sort the full list of ONE typ
get_pricesWhat one call costs on the pay-as-you-go plan, by cost band. FREE — and deliberately so: an agent that learns a price only when it is refused has already been refused by its own wallet. Call this BEFORE budgeting a run of paid tools. Returns the bands (free catalog reads, single-
get_playground_apisCurated APIs that are SAFE TO EXPERIMENT WITH — no key (or an instant, free, self-serve key), no cost, and no real-world side effects. Free, and deliberately so: this is where you start if you are new here. Every entry carries an `example_request` URL that returned HTTP 200 to an
find_apisPaginated, sortable list of APIs across providers — filter by tag, provider, artifact type, industry, region, or rating band. `q` is lexical over the API's own name and description; include=["via_provider"] adds APIs of providers whose name matched (the union apis_io_search count
get_apiFull detail for one API by aid (provider:api-slug); set include=["content"] to inline artifact bodies. Results carry `next`: the sub-resources that exist for this entity and the exact tool call that retrieves each, computed from this record. Pass include_next=false to omit it.
find_providersPaged, sortable, filterable provider list. Size filters need Understanding. Reference: apis://docs/tools/find_providers.
get_providerFull detail for one provider: profile, rating, and the APIs it publishes. The heavy `collections` and `common` sections are omitted by default (their counts are still reported) — pass view=full for the whole document, or fields=["common"] for a section. Narrow for cheap reads: fi
find_tagsPaginated, sortable list of tags in the taxonomy. Filter by `axis` to separate MARKETS (a business someone is in) from CAPABILITIES (the name of a resource in somebody's OpenAPI) — the single most useful distinction in the vocabulary, and a coin flip without it. A tag can carry m
get_tagOne tag: its metadata, neighbor tags, and a top sample of its providers and APIs (with totals). `provider_count` counts companies that classify THEMSELVES here; `api_provider_count` counts the ones reached only through an API or operation tag — the two are disjoint, and a tag wit
find_industriesBrowse industry verticals; sort by provider/API count.
get_industryOne industry: metadata + a top sample of its member providers (ranked, with the total). Use find_providers?industry=slug for the full list, or view=full here. Results carry `next`: the sub-resources that exist for this entity and the exact tool call that retrieves each, computed
find_estatesUNDERSTANDING — Browse corporate estates — one COMPANY whose API surface is spread across many provider records (Amazon 237, Salesforce 27, Cisco 37). Ranked by member count. Use this when two slugs look like separate vendors and you need to know whether they are one company. Pri
get_estateUNDERSTANDING — One estate: the owning provider, the full member roster with per-member API counts and bands, and the estate-wide rating. Use get_provider_estate(slug) to go the other way, from a provider to the company that owns it. Priced B1 (single-entity synthesis) — $0.01 pe
get_provider_estateWhich corporate estate a provider belongs to, if any. Answers 200 with estate:null when the provider stands alone — that is a measured absence, not a missing record.
find_regionsBrowse geographic regions; sort by provider/API count. Returns the 18 regions themselves. The collection also holds region x industry crossover pages (nordics-healthcare and 1,097 more); those are excluded unless you ask for them with type.
get_regionOne region: metadata + a top sample of its member providers (ranked, with the total). Use find_providers?region=slug for the full list, or view=full here. Results carry `next`: the sub-resources that exist for this entity and the exact tool call that retrieves each, computed from
find_countriesBrowse the country dimension — the finest of the four place taxonomies, and the one a buyer usually names ("who is in Germany"). Peer to find_industries / find_regions / find_areas. Search by text; sort by provider count. Membership is derived and known to be partial: read a coun
get_countryOne country: metadata, counts, and a top sample of member providers (with the total). Use find_providers?country=slug for the full ranked list, or view=full here.
find_areasBrowse the API Evangelist areas taxonomy (authentication, webhooks, payments, …) — curated, scored provider indexes. Search by text; sort by provider count.
get_areaOne area: metadata, its dedicated site link, and a top sample of member providers (with the total). Use find_providers?area=slug for the full list, or view=full here. Results carry `next`: the sub-resources that exist for this entity and the exact tool call that retrieves each, c
find_regulationsBrowse the laws, statutes and accreditations the catalog tracks, each joined to the countries, regions and industries it binds. Filter by scope=horizontal to get the regimes that reach a provider with NO industry tag at all, which is the question tags alone cannot answer; or by k
get_regulationOne regulation: what it is, its jurisdiction and scope, a link to the law itself, and reaches[] — the country, region and industry cohorts this regime binds. Use reaches[] to go straight to the affected members with find_providers.
find_extensionsBrowse every OpenAPI `x-` specification extension harvested across the catalog, with the provenance the OpenAPI Initiative registry does not carry: who publishes it, in how many documents, where in the document it appears, and what shape the value takes. Search by key or purpose;
get_extensionOne OpenAPI specification extension: its publishers, occurrence and document counts, where it appears, and the value shapes observed. CHECK is_api_evangelist BEFORE treating a key as provider-originated — some of these are published by API Evangelist, not by a vendor.
find_ratingsRanked ratings leaderboard — filter by band, score range, trend, or facet threshold. Sort by composite (default), delta (biggest gainers), or any quality facet (governance, security, …) to rank providers by that dimension. Each row also carries agent_readiness {score, band} and f
get_provider_ratingOne provider's full rating breakdown (composite, band, trend, six facets), with the two standalone readings beside it: agent_readiness {score, band} and front_door_ai (Front Door AI Index — 1-6 band, raw count, density, tier split, probe date; score is null when the provider does
find_cohortsSTART HERE for market-level questions. Every scored population of providers in the catalog — tags, industries, regions, areas and VC portfolios — as one browsable index. Filter by kind, minimum population, or promotion tier (report/brief/data). Then call cohort_stats for the dist
get_cohortOne cohort: its identity, its population, and the full member roster with each provider's Kin Score and agent readiness. Understanding plan. The analysis parts (stats/rankings/scores/capabilities) are Understanding too — they moved down from Influence on 2026-09-01. Priced per re
find_tag_groupsSTART HERE for capability-map questions. The 1,500+ tag groups the catalog computes — sets of tags that demonstrably travel together across providers (Cards, Logistics, Wealth Management, Observability), the layer between a single tag and a coarse facet. Every response carries a
get_tag_groupOne tag group: its member tags and the full provider roster resolved from the catalog, each with Kin Score and agent readiness. Filter the roster by industry, region, country or area. Free; the DISTRIBUTION over the roster (`stats`) needs Understanding. Note `source_provider_coun
tag_group_tagsThe member tags of one tag group, each joined to its catalog record — provider count, api count, tag quality band and composite. Use it to see what a group is actually made of before trusting the group as a market. Priced B1 (single-entity synthesis) — $0.01 per call under pay-as
cohort_statsUNDERSTANDING — the DISTRIBUTION for a whole market: Kin Score mean/median/min/max/stdev, agent-readiness spread, band split, per-facet averages, and artifact adoption rates. This is the market-stats sheet from a Trend Report, computed live. Always carries a `coverage` block sayi
cohort_rankingsUNDERSTANDING — the leaderboard for a market, on TWO axes: rank by Kin Score composite AND rank by agent readiness. The two orders differ, and the gap between a provider's two ranks is usually the story. Priced per result — $0.005 per request plus $0.0002 per record returned (les
cohort_scoresUNDERSTANDING — facet-level scores for every member of a cohort, each with the cohort average and the delta against it. A 60 in governance means nothing until you know the market sits at 45; this is the endpoint that says so. Priced per result — $0.005 per request plus $0.0002 pe
find_operationsUNDERSTANDING — CATALOG-WIDE operation search: which providers expose a path matching your terms. "Who has a POST /refunds" had no answer before this — tags are what a company says about itself, a path is what its API accepts. Terms match path SEGMENTS (all must appear), so q="pa
deprecated_operationsUNDERSTANDING — every provider publishing at least one operation marked deprecated in its own OpenAPI, ranked by how many. The lifecycle view of the catalog: 8,297 deprecated operations across 681 providers, which nothing could see before, because a provider's own deprecated filt
cohort_historyUNDERSTANDING — the SET-LEVEL time series: how a whole market's Kin Score and agent readiness moved, build by build. There was a per-provider series and a whole-dataset licence and nothing between them, so "how has banking moved over six months" had no answer. Returns the MEAN ov
cohort_failuresUNDERSTANDING — what a whole market gets WRONG: the agent-readiness checks its members most commonly fail, ranked by what fixing each would move the cohort mean. The inverse of gap_analysis, which says where a market is under-served; this says where it is failing the rubric. Turn
cohort_capabilitiesUNDERSTANDING — what every member of a cohort actually publishes: artifact counts by type plus the agent-readiness dimensions each one satisfies. The capability matrix behind a market report. Large cohorts come back in byte-budgeted chunks: while `complete` is false, call again w
compare_cohortsUNDERSTANDING — two markets side by side on one rubric: "is US payments further along than UK banking?" Returns both distributions plus the deltas on score, agent readiness, every facet and every adoption rate. A question a written report cannot answer, because a report only ever
get_provider_operationsEvery operation a provider exposes, across all of its OpenAPIs — method, path, operationId, summary, which API it belongs to, and whether it is deprecated. The shortcut for "what can I actually call here?", which otherwise means fetching and parsing every one of their specs. Wher
get_provider_toolsEvery MCP tool a provider ships, with the operation each one wraps and its auth. Reports provenance per tool: `first-party` means the provider publishes that server, `derived` means API Evangelist generated a candidate tool list from their OpenAPI because no hosted server was fou
get_provider_schemaEvery JSON Schema a provider publishes — the data shapes their API works in, in one list, without walking their artifacts. Free.
get_provider_facetsUNDERSTANDING — one provider's score broken into its facets (discoverability, contract quality, governance, operational transparency, developer ergonomics, commercial clarity) plus any regulatory regime that applies. The composite is one number; these are the parts a team can act
get_agent_readinessEXPLORE — the agent-readiness dimensions and standalone score for ONE provider (spec presence, MCP server, auth clarity, idempotency, error semantics, rate-limit signal, well-known catalog, consent identity, dry-run…). A STANDALONE score, not a slice of the composite. For the sam
find_agent_readinessUNDERSTANDING — the agent-readiness leaderboard across the whole catalog. Rank providers by agent readiness, and filter to those that DO satisfy (has) or do NOT satisfy (missing) specific dimensions — e.g. has="mcp_server,protected_resource_metadata" is the OAuth-capable MCP coho
agent_readiness_dimensionsUNDERSTANDING — diffusion: for each agent-readiness dimension, how many scored providers satisfy it, out of how many, as a share. The denominator every "the agent web is/is not here yet" claim needs and almost never has. Priced B1 (single-entity synthesis) — $0.01 per call under
find_capabilitiesSTART HERE for "what can a business do with these APIs". The business-capability model — 333 top-level capabilities across 28 industries — with how many catalog providers reach each one. Defaults to capabilities the catalog actually reaches; pass all=true for the whole model INCL
get_capabilityOne business capability: its definition, its sub-capabilities, the external authorities it cites, WHICH catalog providers reach it with their ratings, and what it COSTS — `economics` carries how many suppliers publish a price and how opaque the market is (free), and for Understan
get_application_blueprintThe blueprint for one application category (for example crm-sales): which catalog providers its leading apps integrate with, by stack layer and capability, each row graded declared, observed or inferred, with its sources and MCP status. Use shared-layer as the category for the pr
get_capability_edgesUNDERSTANDING — the evidence behind a capability. Every edge that lands on it: the provider, the tag, the exact OpenAPI file, a calibrated confidence, and the QUOTED FRAGMENT OF THE PROVIDER'S OWN CONTRACT that justifies the claim. Only edges at confidence >= 0.7 whose evidence w
get_provider_business_capabilitiesUNDERSTANDING — what ONE vendor's published APIs let a business DO, rolled up by capability, with the tag-level evidence under each. Answers "what is this vendor actually for" from its own contracts rather than its marketing. NOT get_provider_capabilities, which is artifact count
get_provider_capabilitiesWhat one provider publishes, counted by artifact type, with the agent dimensions it satisfies. Free — it is a fact about their own public surface. NOTE: this is artifact counts, NOT business capabilities — for what the vendor lets a business DO, call get_provider_business_capabil
get_provider_evidenceHow a provider's score was established, part by part: first-party (they published it), verified (we fetched and confirmed it), or derived (we inferred it). Free — the basis for a claim should never sit behind the claim. Call this before disputing or quoting a score.
get_rating_rubricUNDERSTANDING — the rubric: bands, facet weights, trend thresholds, so an agent can interpret any score. Moved behind the paywall with the ratings data on 2026-08-31. Priced B1 (single-entity synthesis) — $0.01 per call under pay-as-you-go; included in Understanding and Influence
find_artifactsFind artifacts of ANY one type across the catalog — the cross-type entry point. Each type also has a dedicated find_ tool (find_mcp, find_rules, find_scopes, …) with sorts and filters unique to that type; prefer those when you know the type. Types: mcp, skills, rules, arazzo, pla
compare_providersUNDERSTANDING — Compare 2+ providers side by side: composite/band, per-facet leaders, an artifact-coverage matrix, and each provider's economics — audience, pricing basis, delivery, graded entry cost (USD/month) and marginal cost (USD per unit), with the plan and the quoted figur
gap_analysisUNDERSTANDING — For each provider: high-value artifacts it lacks (MCP, Arazzo, Rules, Skills…), what its peers commonly publish but it lacks, and its score vs the peer median — plus stack-level gaps across the set. Priced B2 (cross-catalog synthesis) — $0.05 per call under pay-as
whats_changedUNDERSTANDING — What changed in the catalog since a date: providers added/updated, plus rating movement measured FROM THAT DATE — each provider's current score against its score at the first scored snapshot on or after `since`, with `was` and `compared_to` on every row. `basis` s
recommend_stackDesign an API stack — the best-rated catalog provider per capability, assembled into a stack. The Understanding preview is the top pick per capability; the full answer adds alternatives, per-pick artifact gaps, and an exportable APIs.json + Arazzo hint. Decompose the domain into
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 9, 2026
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The GitHub repo last changed –, and the latest version (1.3.0) reached the registry 2 months ago.
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In the same category: Spec Driven Development, Remote Desktop Commander, SwarmMemo
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MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
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