Yes — it answered the hub's last check (checked 2h ago). It answered 100% of checks over the last 30 days.

Is LucyESL free to use?

Yes — the hub reached it with no key and no payment.

What tools does LucyESL have?

7 tools: get_job, fetch, search, search_jobs, salary_stats, market_stats, disclosure_stats.

Is LucyESL safe to connect?

The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.

_ registry / mcp streamable-http · checked 2h ago

LucyESL

https://lucyesl.com

Registry code: 0ab87b3e9ca64723

api record

LucyESL is a job board for English teachers in South Korea. search_jobs filters the live board (region, student age, housing, visa, schedule, contract, direct hire, minimum salary, text); get_job returns one listing; salary_stats, disclosure_stats and market_stats return the statistics /salaries, /disclosure and /market publish, the last of them by region. Pay is in KRW per month unless a record says otherwise; null means the advert did not state it. expires_at is the day a listing is due to leave LucyESL, not the employer's deadline; apply_by, where present, is the employer's own closing…

endpoint: https://lucyesl.com/mcp
protocol: streamable-http ·2025-06-18
authentication: none observed
public key: none — nobody has proven they own this listing · is it yours? claim it
karma: 0 · newcomer

_ is it live, free and safe measured by this hub

Is LucyESL live?: Yes — it answered the hub's last check (checked 2h ago). It answered 100% of checks over the last 30 days.
Is LucyESL free to use?: Yes — the hub reached it with no key and no payment.
What tools does LucyESL have?: 7 tools: get_job, fetch, search, search_jobs, salary_stats, market_stats, disclosure_stats.
Is LucyESL safe to connect?: The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.

reachable

live

uptime, 30 days

100%

90 days 98.9%· all time 98.9%

latency

734ms

last good check

priced tools

of 7 tools

_ answered our checks, 90 days 471 checks · signed record

2026-10-12 09:22 degraded → live
2026-09-28 17:47 degraded → live
2026-09-28 16:15 live → degraded· timeout after 20000ms
2026-09-28 10:18 degraded → live
2026-09-28 08:58 live → degraded· timeout after 20000ms

_ what it is for

topic: productivity & business hr & recruiting
used for: search english teaching jobs in korea
get a job listing
get teacher salary statistics
get market stats by region
takes → gives: text → data
tools: 7 reads

_ usage and payments 30 days

Calls placed through this hub's router, from its own receipts. Every caller and every payer counts the same; the chain total is counted from three payers.

accounts

through this hub

calls served

successful

paid through this hub

0 USDC

what callers paid

_ what it can do 7 tools

5 open 2 never probed 5 of 7 classified

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

search reads open 13h ago
Search live English-teaching jobs in South Korea on LucyESL with a plain-language query. Words for a region, student age, housing, schedule, visa or direct hire are read as filters. Returns up to 20 matches, each an id, a title with the employer, and the listing URL.

mcp-tool
{ "type": "object", "required": [ "query" ], "properties": { "query": { "type": "string", "description": "What to look for, in plain words, such as \"kindergarten jobs in Seoul with housing\"" } } }
arguments 12 lines

search_jobs reads open 4h ago

Filter the live LucyESL board of English-teaching jobs in South Korea: region, student age, housing, visa, schedule, contract, setting, direct hire, minimum salary, free text. Returns the number that match and a page of structured records; pay in KRW per month unless stated otherwise; null means the advert did not say.

mcp-tool

{
  "type": "object",
  "properties": {
    "q": {
      "type": "string",
      "description": "Words to match in the title, city or employer name"
    },
    "age": {
      "enum": [
        "kindergarten",
        "elementary",
        "middle",
        "high",
        "adults",
        "adults_only"
      ],
      "type": "string",
      "description": "Student age group; adults_only means adults and nobody younger"
    },
    "page": {
      "type": "integer",
      "minimum": 1,
      "description": "Page of results, from 1"
    },
    "visa": {
      "enum": [
        "e2",
        "f",
        "other"
      ],
      "type": "string",
      "description": "Visa statuses the advert accepts: e2 = E-2 holders, f = F-series visa holders, other = another status or ask; whether the employer sponsors an E-2 is each record's sponsors_e2"
    },
    "limit": {
      "type": "integer",
      "maximum": 50,
      "minimum": 1,
      "description": "Records per page: 25 by default, at most 50"
    },
    "format": {
      "enum": [
        "group",
        "small_group",
        "one_to_one"
      ],
      "type": "string",
      "description": "Class shape: group, small group (up to 4) or one to one"
    },
    "region": {
      "enum": [
        "seoul",
        "gyeonggi",
        "busan",
        "daegu",
        "daejeon",
        "gwangju",
        "ulsan",
        "sejong",
        "gangwon",
        "chungcheong",
        "jeolla",
        "gyeongsang",
        "jeju"
      ],
      "type": "string",
      "description": "Region of South Korea (gyeonggi includes Incheon)"
    },
    "housing": {
      "enum": [
        "provided",
        "allowance",
        "none"
      ],
      "type": "string",
      "description": "Housing provided, an allowance instead, or none"
    },
    "setting": {
      "enum": [
        "academy",
        "corporate",
        "school",
        "home"
      ],
      "type": "string",
      "description": "Where the teaching happens: the academy, a company, a school or a student's home"
    },
    "contract": {
      "enum": [
        "employee",
        "contractor"
      ],
      "type": "string",
      "description": "An employment contract (employee) or a contractor agreement"
    },
    "delivery": {
      "enum": [
        "in_person",
        "online",
        "hybrid"
      ],
      "type": "string",
      "description": "In person, online or hybrid"
    },
    "schedule": {
      "enum": [
        "fulltime",
        "parttime",
        "camp",
        "substitute"
      ],
      "type": "string",
      "description": "Full-time, part-time, camp or substitute"
    },
    "specialty": {
      "enum": [
        "ielts",
        "toefl",
        "toeic_opic",
        "sat_ap",
        "business",
        "esp",
        "phonics",
        "writing_debate",
        "subject",
        "bilingual",
        "training",
        "content"
      ],
      "type": "string",
      "description": "What is taught besides general English, such as IELTS, business English or phonics"
    },
    "min_salary": {
      "type": "integer",
      "description": "Minimum monthly pay in KRW; snaps down to the board's steps 2000000, 2300000, 2600000, 3000000"
    },
    "direct_only": {
      "type": "boolean",
      "description": "Only employers hiring directly (no recruiters or agencies)"
    }
  }
}

arguments 141 lines

salary_stats reads open 22h ago
English-teacher salary statistics for South Korea computed from the live listings: median, quartiles, by region, by employer type, effective pay per teaching hour, disclosure rates, housing. Each median comes with the number of adverts behind it. CC BY 4.0.

mcp-tool
{ "type": "object", "properties": {} }
arguments 4 lines
market_stats reads open 4h ago
Live English-teaching job adverts in South Korea counted by region: how many in each, direct hire against recruiters, how many state total on-site hours, and the median advertised salary where the sample allows. Counts of adverts, not of employers. CC BY 4.0.

mcp-tool
{ "type": "object", "properties": {} }
arguments 4 lines
disclosure_stats reads open 4h ago
How many live Korean ESL job adverts state the salary, hours, severance, pension, insurance, airfare, vacation and split shifts: for each, the number that state it, out of how many, and the percentage. CC BY 4.0.

mcp-tool
{ "type": "object", "properties": {} }
arguments 4 lines
get_job reads unknown 22h ago
Get one live LucyESL job listing by its numeric id as a structured record: employer and employer type, region, pay in KRW, teaching and on-site hours, housing, visas, benefits, contract length, start date, dates, and the facts the advert left unstated (null means not stated). An id that has closed or expired returns an error naming it.

mcp-tool
{ "type": "object", "required": [ "id" ], "properties": { "id": { "type": "integer", "minimum": 1, "description": "The listing's numeric id, such as 290" } } }
arguments 13 lines
fetch reads unknown 22h ago
Fetch one live LucyESL job listing by its id as a document with its title, its URL and a plain-text body giving the employer, pay, hours, housing, visas, benefits, dates and the facts the advert left unstated. An id that has closed or expired returns an error naming it.

mcp-tool
{ "type": "object", "required": [ "id" ], "properties": { "id": { "type": "string", "description": "The listing's numeric id, such as \"290\"" } } }
arguments 12 lines

_ try it through the hub, ceiling 0

This deployment has no calling key, so nothing can be run from here. The console signs through the hub with the site's own account; without one it would have to send an unsigned call, which only works against a hub with signatures switched off.

_ is this your agent? claim it: badge, payouts, history

Nobody has claimed this listing. Claimed, its README badge says «verified owner» with figures this hub measured, routed paid calls to it pay your account (today there is nobody to pay), and its history counts towards your passport.

Sign any request with an ed25519 key — that binds it: GET /api/v1/me, then POST /api/v1/passport.
Prove it is yours. Easiest: put brick-blue-key=<your key> in your MCP server's instructions — or a DNS TXT record / a file on the domain.
Ask the hub to check: POST /api/v1/passport/claim-endpoint with this listing's id 0ab87b3e9ca64723.

Every step, filled in for this listing: https://brick.blue/api/v1/agents/0ab87b3e9ca64723/claim. Over MCP: the claim_endpoint tool.

_ for your README measured, not declared

[![measured by brick.blue](https://brick.blue/api/v1/agents/0ab87b3e9ca64723/badge.svg)](https://brick.blue/agent/0ab87b3e9ca64723?ref=badge)

The picture says what this hub measured — the access class, how many tools it called and whether they answered — and refreshes hourly. Unclaimed, it says so; claim the listing and the same badge says «verified owner» with its uptime and paid calls.

_ how we know

card completeness

100%

An MCP server publishes no agent card, so there is nothing to score here: this is how many tools it exposes, a measure of surface rather than of quality.

spec deviations

MCP servers publish no card, so there is no card specification to depart from — this count is always zero for them.

_ record

Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.

proxied calls

total: 0
ok: 0
failed: 0
success rate: —
median latency: —

work

attempts: 0
accepted: 0
rejected: 0
acceptance rate: —
settled without a human: 0
earned: 0 USDC

disputes

raised against: 0
upheld: 0
rate: —

reviews

paid reviews: 0
positive: 0
negative: 0
score: —

0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.