Use whenever the user wants to find, shortlist, vet, enrich, or research US professional-services firms — law, marketing, consulting, accounting, IT services, architecture, engineering, HR, PR, design, and similar B2B service providers. Triggers on requests like "find me a PPC agency in California", "shortlist three boutique IP law firms", "build a longlist of 50 mid-size IT consultancies", or "here are 12 agency domains — pull contact info and confirm which are US-based", even when the need is described indirectly without naming a category. Drives the ServiceGraph API (api.servicegraph.co) — a 100k+ US firm catalog with filters for industry, services, location, size, ratings, and third-party listings. Skip when the user is asking for personal/consumer services for themselves (an individual's own legal, tax, or medical needs), non-US firms, individual freelancers, retail/ecommerce/SaaS-product companies, recruiting-an-employee tasks, or general web research that doesn't need a structured firm directory.
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Use whenever the user wants to find, shortlist, vet, enrich, or research US professional-services firms — law, marketing, consulting, accounting, IT services, architecture, engineering, HR, PR, design, and similar B2B service providers. Triggers on requests like "find me a PPC agency in California", "shortlist three boutique IP law firms", "build a longlist of 50 mid-size IT consultancies", or "here are 12 agency domains — pull contact info and confirm which are US-based", even when the need is described indirectly without naming a category. Drives the ServiceGraph API (api.servicegraph.co) — a 100k+ US firm catalog with filters for industry, services, location, size, ratings, and third-party listings. Skip when the user is asking for personal/consumer services for themselves (an individual's own legal, tax, or medical needs), non-US firms, individual freelancers, retail/ecommerce/SaaS-product companies, recruiting-an-employee tasks, or general web research that doesn't need a structured firm directory.
Drive the ServiceGraph API (https://api.servicegraph.co) to find,
shortlist, and enrich US professional-services firms.
The API hosts several datasets behind a uniform per-dataset URL
shape (/v1/datasets/:id/…). This skill is for the agencies dataset —
dataset id pro_services — which holds 100k+ B2B service firms
classified across 22 industries with multi-tag service taxonomies,
location, size, and third-party rating signals.
Any HTTP client works (curl, fetch, requests). Examples below use curl.
Prerequisites
ServiceGraph access, either:
the ServiceGraph MCP server (https://mcp.servicegraph.co) loaded in
your harness — this plugin's .mcp.json wires it up; OAuth 2.1 + PKCE
keeps credentials in the harness sandbox — or
a ServiceGraph API key (vk_…, minted at
https://servicegraph.co/profile/api-keys) available as
SERVICEGRAPH_API_KEY in the environment or .env.local for the REST
path (setup steps under Auth below).
An HTTP client for the REST path — the examples use curl.
Instructions
The loop is free-first: discovery, validation, search, and brief reads cost
nothing; only unlock after the user confirms the spend.
Pick the call path — the ServiceGraph MCP tools if loaded, otherwise the
REST flow (MCP server and Auth sections below).
GET /v1/datasets/pro_services/fields?include_values=1 — confirm the
fields and values you plan to filter on exist.
Build the filter (Filter DSL below) and validate it with
GET /v1/datasets/pro_services/check — or draft it from plain English via
POST /v1/datasets/pro_services/translate-intent.
GET /v1/datasets/pro_services/search — present the free brief cards and
let the user pick.
Quote the unlock cost (10 credits per row, 30-day TTL) and get an explicit
go-ahead.
POST /v1/datasets/pro_services/unlocks with the chosen apexes; report the
revealed detail.
GET /v1/me/credits to report the remaining balance when asked.
MCP server (preferred for authed calls)
If your agent harness has the loaded
() — recognizable by tool names
containing — prefer those tools over raw HTTP. The
MCP server uses OAuth 2.1 + PKCE so the harness handles credentials
in its own sandbox and no token value ever enters the LLM context.
Otherwise, fall through to the REST flow described below.
ServiceGraph MCP server
https://mcp.servicegraph.co
servicegraph
API surface
Every endpoint requires the bearer (Authorization: Bearer vk_…).
There is no anonymous tier.
Endpoint
Cost
Use it for
GET /v1/datasets
free
Discover available datasets.
GET /v1/datasets/pro_services
free
Full schema for this dataset (brief vs detail fields, allowed filters, unlock price, TTL).
GET /v1/datasets/pro_services/fields[?include_values=1&q=]
free
Filter-field catalog + DSL grammar. Call this first per session.
GET /v1/datasets/pro_services/values/:field[?q=&limit=&offset=]
free
Enumerate values for one field (e.g. legal industry / state / service_provided values).
GET /v1/datasets/pro_services/check?filter=…
free
Validate a filter string. Returns {valid, normalized} or {valid:false, error}.
POST /v1/datasets/pro_services/translate-intent
free
Body {intent, model?}. LLM-translates plain English → DSL filter + sanity-check row count.
GET /v1/datasets/pro_services/search?filter=…&limit=&offset=
free
Brief firm cards + per-row unlock hint. No url, no phone, no email.
GET /v1/datasets/pro_services/:apex
free
One row: always brief; detail block only if caller has an active unlock for (user, dataset, apex). Idempotent, never charges.
POST /v1/datasets/pro_services/unlocks
10 credits / firm
Body {apexes: [...]}, max 100. Atomic batch — either all uncached apexes unlock, or none do (402 if balance short). Already-unlocked rows return was_cached:true with no extra charge. Detail TTL: 30 days. Returns brief + detail + per-item billing.
Cost model in one paragraph. Discovery, validation, search, and
brief reads are free. Detail data (apex, full url, phone, email,
social, address, legal name, platforms map) costs 10 credits per
firm and lasts 30 days. Re-fetching an unlocked firm within the
TTL is free — both the detail GET and the unlock POST honor the
cache. Charges are atomic per POST /unlocks call: a 402 leaves
balance untouched.
Auth
Tokens are vk_* API keys minted in the dashboard. The user creates
them themselves; this skill never sees raw email/password.
Security model — keep the token out of the LLM context.
Never read .env, .env.local, or any other credential file
into your context. The token's literal value must never appear in
the conversation.
Every authed call goes through a shell wrapper so the token flows
from the user's environment / dotenv file into the
Authorization header without round-tripping through the LLM.
First-call resolution:
Just try the call. Dispatch via shell, sourcing .env.local
if present:
Then either export it in your shell —
export SERVICEGRAPH_API_KEY=vk_… — or add the line
SERVICEGRAPH_API_KEY=vk_… to .env.local in this directory.
Tell me when done and I'll retry. Please don't paste the key
into chat — keep it out of the LLM context."
After the user signals ready, re-dispatch the same call. If a
later call returns 401, the key was revoked or rotated — re-prompt.
For the user's convenience: if SERVICEGRAPH_API_KEY is already set
or already in .env.local, the very first call will succeed and the
prompt step never happens.
Filter DSL
One query parameter, GitHub-search-style.
filter := orExpr
orExpr := andExpr ("OR" andExpr)*
andExpr := notExpr (("AND")? notExpr)* # whitespace = implicit AND
notExpr := ("NOT" | "-") notExpr | atom
atom := "(" filter ")" | predicate
predicate:= IDENT op valueOrList | bareword
op := ":" | "=" | ">=" | "<=" | ">" | "<"
valueOrList := value ("," value)*
value := IDENT | NUMBER | tagAtEvidence
tagAtEvidence := IDENT "@" ("low"|"medium"|"high")
bareword := IDENT | NUMBER # → keyword:<bareword>
Four rules that bite:
AND binds tighter than OR.a OR b c parses as a OR (b AND c).
Use parens.
Comma list = OR within one predicate.state:CA,NY,TX matches
any of the three.
Negation is -x or NOT x. Negative literals inside a comma
list are not allowed: state:CA,-NY is rejected. Use
state:CA -state:NY.
Bareword = keyword search. Any IDENT or NUMBER not followed by
an operator becomes a free-text substring across name / brand /
title / meta / legal_name. Multiple barewords AND. Wrap multi-word
phrases in double quotes: keyword:"foo bar". Punctuation
(& ' . ; ! ? * / etc.) is silently dropped outside quotes, and
stray commas are treated as ANDs — so paste-friendly inputs like
Cox, Castle & Nicholson work without quoting.
presence — has:phone, has:clutch, has:rating, has:linkedin_company, etc.
keyword — any bareword in the filter becomes a free-text substring across name / brand / title / meta / legal_name / linkedin company text.
Examples (validate yours with /check):
industry:marketing_agency service_provided:seo
dental industry:marketing_agency
industry:legal state:CA,NY -company_size_signal:solo
industry:management_consulting (service_provided:strategy-consulting@high OR service_provided:operations-consulting@high)
state:CA has:phone has:email
rating>=4 review_count_total>=20 has:clutch
industry:it_services NOT (service_provided:web-development OR service_provided:hosting)
"Cox, Castle & Nicholson"
Don't put kind: in the filter — the dataset URL is authoritative and
the API will reject it. Don't use fields outside this dataset's allowed
list either; /check will tell you which ones.
Identifying firms — apex
Firms are identified by their apex domain (registered domain only:
mckinsey.com, not www.mckinsey.com/about). When the user gives you
URLs, strip to the apex before calling /datasets/pro_services/:apex
or POST /unlocks. The endpoint accepts any lowercase host-shaped
string; a 404 means the firm isn't in this dataset (no charge).
Output
All responses are JSON.
Search returns free brief firm cards — apex, name, location, and
rating signals — plus a per-row unlock hint and the match total. Briefs
never include url, phone_primary, email_primary, legal_name,
address_full, or the full platforms map.
Unlock (POST …/unlocks) returns each unlocked firm's detail block —
contact fields, address, socials, the platforms map — plus per-item
billing; detail stays readable for 30 days.
Errors arrive as a JSON envelope
{"error": {"code": "…", "message": "…"}} — see Errors below.
Examples
A. Shortlist by industry + state
GET /v1/datasets/pro_services/search?filter=industry:legal+state:CA+-company_size_signal:solo&limit=20
# → 20 brief cards + total + per-row unlock.status; pick top 3 with user
# user agrees → unlocking 3 firms costs 30 credits, 30-day TTL
POST /v1/datasets/pro_services/unlocks
{ "apexes": ["firm-a.com", "firm-b.com", "firm-c.com"] }
# → brief + detail (url, phone, email, social, address) for all 3
B. Multi-tag service intersection
User: "Marketing agency that does both branding and SEO at high evidence."
GET /v1/datasets/pro_services/search?filter=industry:marketing_agency+service_provided:branding@high+service_provided:seo@high&limit=10
C. Quality threshold
User: "Consultancies with at least 4★ and 20+ reviews and a Clutch listing."
GET /v1/datasets/pro_services/search?filter=industry:management_consulting+rating>=4+review_count_total>=20+has:clutch&limit=10
D. Indirect intent — user describes a need without naming the category
User: "I need someone to handle our open enrollment communications for 200 employees."
That's HR/benefits comms. Either translate by hand or hand it to the
intent translator:
POST /v1/datasets/pro_services/translate-intent
{ "intent": "open enrollment communications for 200 employees" }
# → {filter: "...", reasoning: "...", valid, normalized, count}
Then validate with /check and run /search. If the breakdown is
thin, broaden — drop the service tag, add adjacent industries, or
fall back to keyword.
E. Keyword + structured filter
User: "HIPAA-savvy IT consultancies in Texas."
GET /v1/datasets/pro_services/search?filter=hipaa+industry:it_services+state:TX&limit=10
hipaa is a bareword keyword → substring match in firm text.
F. BYO apex list — enrich domains the user already has
User pastes 12 domains. Two-step:
GET /v1/datasets/pro_services/:apex for each — free brief, 404
for not-in-catalog (no charge). Flag misses to the user.
User picks the N they want fully enriched. One
POST /v1/datasets/pro_services/unlocks with all of them =
10×N credits, single atomic charge, single response with
detail bundles.
Within the 30-day TTL, re-running step 2 is free for the same apexes.
Gotchas
looks_not_pro_services / not_in_dataset 404 is not a bug. A firm may exist in another dataset but 404 on /datasets/pro_services/:apex if its kind doesn't include pro_services. Skip and continue; not charged.
Briefs from /search do NOT include apex ... wait, they do. Briefs include apex (and name, industry, service_provided, location, ratings). What they DON'T include: url, phone_primary, email_primary, legal_name, address_full, full platforms map. Those require an unlock.
Catalog is US-only B2B pro-services. Refuse non-US asks rather than returning misleading partial matches. Refuse consumer-facing legal/financial requests (e.g. "I need a divorce lawyer for personal matters") — the catalog is built for B2B procurement.
Always confirm legal field values via /fields?include_values=1. Inventing industry:law instead of industry:legal returns zero results silently — the parser doesn't validate categorical values.
Multi-word phrases must be split or quoted.family law parses as two AND'd keywords (family AND law); "family law" parses as a single phrase.
Unlock is atomic.POST /unlocks with 5 apexes either charges 50 credits (or less if some were cached) or charges nothing on 402. Plan the batch — don't dribble single-apex calls.
Within-TTL re-views are free. Re-running POST /unlocks for an apex that's still inside its 30-day TTL returns was_cached:true and no charge. Re-pagination of /search is free regardless.
/translate-intent is a convenience, not a contract. It may return filter:"" if the intent is too vague, or a filter that doesn't match what the user wanted. Always inspect reasoning and the sanity-check count before running /search.
Errors
All errors return JSON: {"error": {"code": "...", "message": "..."}}.
Status
Code
What to do
400
filter_parse_error
Payload includes position. Fix the filter, re-validate with /check.
400
filter_required
Empty filter where one is required.
400
kind_in_filter
The URL is authoritative — strip any kind: predicate from the filter.
400
field_not_in_dataset
The filter references a field this dataset doesn't expose. Drop it or pick a different dataset.
400
invalid_apex
Apex doesn't look like a domain. Re-normalize.
401
unauthorized / invalid_audience
Key missing/expired/wrong audience. Re-prompt for a new vk_… from /profile/api-keys.
402
insufficient_credits
Balance too low for the unlock batch. Response carries needed and balance. Surface to the user; nothing was charged.
404
unknown_dataset
Wrong dataset id in the URL.
404
not_found
Apex isn't in the catalog. Not charged. Skip and continue.
404
not_in_dataset / apex_not_in_dataset
Apex exists but its kind doesn't include pro_services. Not charged. Skip.
429
rate_limited
Honor Retry-After header.
Authed responses carry X-RateLimit-* headers. GET /me/credits is
the source of truth for spend planning.
End-to-end example
User: "Find me three top management-consulting firms in California
focused on strategy, with strong third-party ratings."
# 1. Discover fields once per session
GET /v1/datasets/pro_services/fields?include_values=1
# Confirms 'management_consulting', 'strategy-consulting', 'rating' are legal.
# 2. Validate the filter (free)
GET /v1/datasets/pro_services/check?filter=industry:management_consulting+state:CA+service_provided:strategy-consulting@high+rating>=4+review_count_total>=20
# 3. Search briefs (free)
GET /v1/datasets/pro_services/search?filter=...&limit=10
# → 10 brief cards + total + per-row unlock.status:'none'
# 4. Present briefs, get user's pick of 3. Tell them: "Unlocking 3
# firms costs 30 credits and gives 30 days of detail access."
# 5. Atomic batch unlock (charges 30 credits, returns detail too)
POST /v1/datasets/pro_services/unlocks
{ "apexes": ["firm-a.com", "firm-b.com", "firm-c.com"] }
# → brief + detail (url, phone, email, social, address, platforms) ×3
# 6. (Optional) Confirm remaining balance
GET /v1/me/credits
