1313 Halsey Street, Brooklyn, NY 11237
BBL 3034060047 (Borough 3, Block 3406, Lot 47) · BIN 3078686 · Last updated:
Summary · as of October 31, 2026
1313 Halsey Street (Brooklyn, NY 11237; tax lot BBL 3034060047) is a 6-unit walk-up apartment building (building class C2: walk-up apartments, five or six families), built around 1907, on a 2,633 sq ft lot zoned R6. City tax records list the owner as DAFNA DEVELOPMENT GROUP, LLC; per ACRIS, a deed to this owner dated November 18, 2010 lists a price of $550,000. The Department of Finance's final market value for tax year 2027 is $1,248,000. As of October 31, 2026, NYC Open Data shows one DOB job with a permit issued but no sign-off, one active DOB violation, one active ECB violation and four open HPD violations. There were three 311 requests in the past 12 months and no HPD complaints since 2019. (Source: NYC Open Data — DOB, HPD, OATH, DOF, DCP and ACRIS datasets — compiled by NYC Property Facts.)
- Owner of record
- DAFNA DEVELOPMENT GROUP, LLC
- Building class
- C2 · Walk-up apartments, five or six families
- Year built · units
- 1907 · 6 res.
- Lot area · zoning
- 2,633 sq ft · R6
- Market value (DOF)
- $1,248,000 FY2027
- Last priced deed
- $550,000 · 2010-11-18
- BBL
- 3034060047
- BIN
- 3078686
- 1Open DOB jobs (permit issued, no sign-off)
- 1Active DOB violations
- 1Active ECB violations
- 4Open HPD violations
- 0OATH tickets with unpaid balance
How to cite: NYC Property Facts, “1313 Halsey Street, Brooklyn, NY 11237 (BBL 3034060047)”, data as of 2026-10-31, https://nycpropertyfacts.com/ny/brooklyn/1313-halsey-street-3034060047. Source: NYC Open Data.
Lot & building
Basic facts about the tax lot and building from the city’s PLUTO database.
- Owner (as listed by the city)
- DAFNA DEVELOPMENT GROUP, LLCThe owner name on the city’s tax records. It can lag behind recent sales and is often an LLC.
- Building class
- C2 – Walk-up apartments, five or six familiesThe Department of Finance’s category for what kind of building this is.
- Land use
- Multi-family walk-up buildingsCity Planning’s broad category of how the lot is used.
- Year built
- 1907Often an estimate for older buildings.
- Floors
- 3
- Units
- 6 residential / 6 totalResidential units are apartments; total includes stores and offices.
- Buildings on lot
- 1
- Lot size
- 2,633 sq ft (26.33 ft × 100 ft)
- Building floor area
- 5,460 sq ft
- Zoning
- R6The zoning district sets what can be built and used here. Residential district.
- Built vs. allowed density (FAR)
- 2.07 built / 2.43 max residentialFloor Area Ratio = building floor area ÷ lot area. If built FAR is below the maximum, zoning may allow more floor area (other rules apply).
- Identifiers
- BBL 3034060047 (Borough 3, Block 3406, Lot 47) · BIN 3078686BBL identifies the tax lot; BIN identifies each building (from DOB/HPD/footprint records).
Agency lookups: DOB BIS · ZoLa (zoning map) · ACRIS
Source: PLUTO (Dept. of City Planning) — city dataset updated 2026-08-24; data as of 2026-10-31; Building Footprints — city dataset updated 2026-10-25; data as of 2026-10-31
Tax assessment
How the Department of Finance values this lot for property tax.
- Market value (tax year 2027, final roll)
- $1,248,000The Department of Finance’s estimate of value for tax purposes. It is not an appraisal and is often far from the sale price.
- Assessed value
- $561,600The portion of market value that taxes are calculated on (capped by law for small homes).
- Taxable value (final)
- $106,042Assessed value minus any exemptions.
- Tax class
- Tax class 2A – residential rental, 4–6 units
| Tax year | Roll | Market value | Assessed value | Tax class |
|---|---|---|---|---|
| 2027 | Final | $1,248,000 | $561,600 | 2A |
| 2026 | Final | $1,114,000 | $501,300 | 2A |
| 2025 | Final | $1,221,000 | $549,450 | 2A |
Source: DOF Property Valuation and Assessment Data — city dataset updated 2026-09-14; data as of 2026-10-31
Sales & deed history 10
Deeds recorded with the City Register (ACRIS). A deed transfers ownership. A $0 or very low price usually means a transfer between related parties, an estate, or a refinance-related transfer, not a market sale. This is not a title search; mortgages, liens and other documents are not shown.
| Date | Type | Price | Seller (grantor) | Buyer (grantee) | Doc ID |
|---|---|---|---|---|---|
| 2010-11-18 | DEED | $550,000 | Rr Reo Ii Llc | Dafna Development Group, Llc | 2010111900517001 |
| 2010-10-08 | DEED | $614,317 | Jbi Holdings Llc | Rr Reo Ii Llc | 2010101501149001 |
| 2005-11-30 | DEED | $755,000 | Ciancio, Jorge A; Ciancio, Rosa | Jbi Holdings Llc | 2005120502540001 |
| 2004-06-23 | DEED | $0 / not stated | Ciancio, Jorge | Ciancio, Jorge; Ciancio, Rosa | 2004070300110001 |
| 2000-10-10 | DEED | $0 / not stated | Chan, Ting Hong; Wong, Yuk Wan; Wong, Siu Ping Chan; Ng, Bing Yee | Lulu, Ofer Ben | FT_3340007430534 |
| 2000-10-10 | DEED | $0 / not stated | Lulu, Ofer Ben | Ciancio, Jorge | FT_3430007430543 |
| 1986-10-01 | DEED | $0 / not stated | Tan, Nyet Ying; Tan, Soo Peng | Wong, Yuk Wan; Wong, Siu Ping Chan; Ng, Bing Yee; Chan, Ting Hong | FT_3370001204437 |
| 1985-06-10 | DEED | $0 / not stated | Ceb Realty Corp | Tan, Soo Peng; Tan, Nyet Ying | FT_3400001096740 |
| 1973-09-26 | DEED | $0 / not stated | Boisselle Catherine R; Boisselle Charles E | Ceb Rlty Corp | BK_7330066101120 |
| 1972-06-06 | DEED | $0 / not stated | Abbadessa Jean | Boisselle Catherine R; Boisselle Charles E | BK_7230056001576 |
Source: ACRIS Real Property Master — city dataset updated 2026-10-08; data as of 2026-10-31; ACRIS Real Property Legals — city dataset updated 2026-10-08; data as of 2026-10-31; ACRIS Real Property Parties — city dataset updated 2026-10-08; data as of 2026-10-31
DOB job filings 1 open of 1
A “job” is an application to the Department of Buildings to do construction work. A job marked Permitted, not signed off had a work permit issued but the city has no record of final sign-off (inspection/completion). Old jobs left in this state are common and appear in buyer and lender due diligence; the work may or may not have been done.
| Status | Job # | Type | Filed | Est. cost |
|---|---|---|---|---|
| Permitted, not signed off PERMIT ISSUED - ENTIRE JOB/WORK · 2012-05-09 | 320257440 BIS | A2 – Alteration with multiple work types (no change to use/occupancy) | 2010-12-30 | $295,280 |
Source: DOB NOW: Build – Job Application Filings — city dataset updated 2026-10-30; data as of 2026-10-31; DOB Job Application Filings (BIS) — city dataset updated 2026-10-30; data as of 2026-10-31
Work permits 4
Individual permits issued under DOB jobs (one job can have several permits, e.g. plumbing and construction). Permit expiration alone does not mean the job was completed or signed off.
| Issued | Expires | Job # | Work | Permit status |
|---|---|---|---|---|
| 2012-05-09 | 2013-05-09 | 320257440 BIS | Plumbing / Plumbing | ISSUED (renewal) |
| 2011-02-01 | 2012-02-01 | 320257440 BIS | Equipment work / Boiler | ISSUED (initial) |
| 2011-02-01 | 2012-02-01 | 320257440 BIS | Plumbing / Plumbing | ISSUED (initial) |
| 2011-01-06 | 2012-01-06 | 320257440 BIS | Equipment work / Other / general construction | ISSUED (initial) |
Source: DOB NOW: Build – Approved Permits — city dataset updated 2026-10-30; data as of 2026-10-31; DOB Permit Issuance (BIS) — city dataset updated 2026-10-31; data as of 2026-10-31
DOB violations 1 active of 12
Violations issued by the Department of Buildings for building-code or zoning conditions. Active means DOB has not recorded the violation as resolved or dismissed. Many active DOB violations are old (e.g. elevator or boiler inspection paperwork).
| Status | Issued | Type | Description | Number |
|---|---|---|---|---|
| Active V-DOB VIOLATION - ACTIVE | 1993-08-16 | LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIRED | V081693LL629121252 | |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 2011-12-13 | LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED | VIOLATION ISSUED FOR FAILURE TO FILE ANNUAL BOILER 2010 INSPECTION REPORT | V*121311LBLVIO12260 |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 2010-06-12 | UB-UNSAFE BUILDINGS NONE | V*061210UB3180/10 | |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 2010-04-23 | UB-UNSAFE BUILDINGS NONE | V*042310UB3189/10 | |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 2009-12-31 | LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED | V*123109LBLVIO14314 | |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 2009-01-01 | LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIRED | V*010109LL629111090 | |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 2008-10-09 | UB-UNSAFE BUILDINGS NONE | V*100908UB3038/08 | |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 2002-03-26 | LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIRED | V*032602LL629120700 | |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 1999-03-16 | LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIRED | V*031699LL629119666 | |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 1998-05-04 | LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIRED | V*050498LL629117178 | |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 1997-02-10 | LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIRED | V*021097LL629125336 | |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 1995-08-29 | LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIRED | V*082995LL629123301 |
Source: DOB Violations — city dataset updated 2026-10-31; data as of 2026-10-31
ECB violations (DOB) 1 active of 4
DOB violations that go to a hearing at OATH (formerly the Environmental Control Board) and can carry fines. Active means the condition has not been certified as corrected and/or the case is not resolved. A balance due is a fine the city says is unpaid.
| Status | Issued | Severity | What it was for | Penalty / paid / balance | ECB # |
|---|---|---|---|---|---|
| Active STIPULATION/IN-VIO · NO COMPLIANCE RECORDED | 2018-08-23 | CLASS - 3 | WORK DOES NOT CONFORM TO APPROVED CONSTRUCTION DOCUMENTS AND/OR APPROVED AMENDMENTS FOR JOB #320257440.2ND AND 3RD FLOOR PLAN SHOWS AND ENCLOSED STARIWAY WITH FIRE PROTECTED DOORS FOUND STAIRWAY OPEN TO THE FLO | $500 / $522 / $0 | 35308409Y |
| Resolved IN VIOLATION · COMPLIANCE-INSP/DOC | 2019-06-18 | CLASS - 2 | FAILURE TO COMPLY WITH THE COMMISSIONER'S ORDER CONTAINED IN SUMMONS/VIOLATION#35308409Y ISSUED ON 8/23/2018 & TO FILE A CERTIFICATE OF COR RECTION PURSUANT TO 28-201.1 AND 1RCNY 102-01(D)(2).AN ACCEPTIBLE CERT | $1,250 / $1,250 / $0 | 37015202K |
| Resolved DISMISSED · N/A - DISMISSED | 2019-06-18 | CLASS - 2 | FAILURE TO COMPLY WITH THE COMMISSIONER'S ORDER CONTAINED IN SUMMONS/VIOLATION#35308408M ISSUED ON 8/3/2018 AND TO FILE A CERTIFICATE OF CORRECTION PURSUANT TO 28-201.1 AND 1RCNY 102-01(D)(2).AN ACEPTIBLE CERT | $0 / $0 / $0 | 37015201Z |
| Resolved STIPULATION/IN-VIO · CERTIFICATE ACCEPTED | 2018-08-03 | CLASS - 2 | FAILURE TO MAINTAIN BUIILDING IN CODE COMPLIANT MANNER.NOTED:AT FRONT OF BUILDING AN 8 RISERS STAIRS LEADING TO CELLAR INSTALLED WITHOUT HAND RAIL.REM:INSTALL SAFETY MAILINGS | $625 / $626 / $0 | 35308408M |
Source: DOB ECB Violations — city dataset updated 2026-10-31; data as of 2026-10-31
OATH tickets (all agencies) 0 unpaid of 125
Summonses heard at the Office of Administrative Trials and Hearings, from agencies like Sanitation, Buildings, Fire and Health, linked to this lot’s block and lot. Default means the respondent did not appear at the hearing, which typically results in the maximum penalty. Tickets may be issued to tenants or businesses at the address, not just the owner. DOB ECB tickets appear here too.
| Status | Date | Agency | Charge | Respondent | Imposed / paid / balance | Ticket # |
|---|---|---|---|---|---|---|
| No balance due PAID IN FULL | 2026-07-20 | Dos - Enforcement Agents | SIDEWALK OBSTRUCTION | DAFNA DEVELOPMENT GROUP LLC | $50 / $50 / $0 | 049928925X |
| No balance due PAID IN FULL | 2025-12-26 | Sanitation Recycling | DIRTY SIDEWALK | DAFNA DEVELOPMENT GROUP LLC | $50 / $50 / $0 | 049512303M |
| No balance due PAID IN FULL | 2025-12-17 | Sanitation Others | FAILURE TO CLEAN 18 INCHES INTO STREET | DAFNA DEVELOPMENT GROUP LLC | $50 / $50 / $0 | 049578865X |
| No balance due PAID IN FULL | 2025-06-13 | Sanitation Others | IMPROPER RECEPTACLE FAILURE TO CONTAINERIZE - RESIDENTIAL 1ST | DAFNA DEVELOPMENT GROUP LLC | $50 / $50 / $0 | 049233609N |
| No balance due PAID IN FULL · SETTL IN-VIO | 2022-12-20 | Sanitation Others | DIRTY SIDEWALK | DAFNA DEVELOPMENT GROUP LLC | $300 / $205 / $0 | 047657176N |
| No balance due PAID IN FULL | 2022-06-10 | Sanitation Recycling | DIRTY SIDEWALK | DAFNA DEVELOPMENT GROUP LLC | $50 / $50 / $0 | 047510802P |
| No balance due PAID IN FULL | 2021-07-23 | Sanitation Others | DIRTY SIDEWALK DIRTY AREA | DAFNA DEVELOPMENT GROUP LLC | $100 / $100 / $0 | 047246787X |
| No balance due PAID IN FULL | 2021-01-29 | Sanitation Others | DIRTY SIDEWALK DIRTY AREA | DAFNA DEVELOPMENT GROUP LLC | $100 / $100 / $0 | 047033983Y |
| No balance due PAID IN FULL | 2020-11-09 | Sanitation Others | DIRTY SIDEWALK DIRTY AREA | DAFNA DEVELOPMENT GROUP LLC | $100 / $100 / $0 | 0212707725 |
| No balance due PAID IN FULL | 2020-03-09 | Sanitation Others | DIRTY SIDEWALK DIRTY AREA | DAFNA DEVELOPMENT GROUP LLC | $100 / $100 / $0 | 0210475110 |
| No balance due PAID IN FULL | 2019-08-19 | Sanitation Others | FAILURE TO CLEAN 18 INCHES INTO STREET | DAFNA DEVELOPMENT GROUP LLC | $100 / $100 / $0 | 0208922533 |
| No balance due PAID IN FULL · SETTL IN-VIO | 2019-06-26 | Sanitation Others | FAILURE TO CLEAN 18 INCHES INTO STREET | DAFNA DEVELOPMENT GROUP LLC | $300 / $200 / $0 | 0208487272 |
Showing 12 of 125 records. The API and the source dataset have the full list.
Source: OATH Hearings Division Case Status — city dataset updated 2026-10-31; data as of 2026-10-31
HPD registration & contacts
Owners of most rental buildings must register with the Department of Housing Preservation and Development each year and list an owner and managing agent.
- HPD building ID
- 305633
- Last registered
- 2026-09-02
- Registration valid until
- 2027-09-01 CurrentRegistrations must be renewed every year.
| Role | Name | Company | Business city |
|---|---|---|---|
| Headofficer | Eli Noy | Brooklyn, Ny | |
| Sitemanager | Oren Noy | ||
| Corporateowner | DAFNA DEVELOPMENT GROUP LLC | Brooklyn, Ny | |
| Agent | Oren Noy | Dafna Development and Management | Brooklyn, Ny |
Source: HPD Multiple Dwelling Registrations — city dataset updated 2026-10-28; data as of 2026-10-31; HPD Registration Contacts — city dataset updated 2026-10-28; data as of 2026-10-31
HPD housing-code violations 4 open of 10
Violations HPD inspectors issued for conditions in residential buildings (heat, leaks, mold, pests, lead paint, etc.). Class letters show how serious: Class A – non-hazardous (HPD gives 90 days to correct); Class B – hazardous (30 days to correct); Class C – immediately hazardous (24 hours to correct for most conditions); Class I – information / order (e.g. orders to register, lead or other administrative orders). Open means HPD has not recorded the condition as corrected.
| Status | Class | Issued | Apt | Condition |
|---|---|---|---|---|
| Open First No Access To Re- Inspect Violation · 2025-04-15 | C | 2007-06-08 | 1L | § 27-2018 ADM CODE ABATE THE NUISANCE CONSISTING OF RODENTS - IN THE ENTIRE APARTMENT LOCATED AT APT 1L, 1st STORY, APARTMENT AT SOUTH |
| Open First No Access To Re- Inspect Violation · 2025-04-15 | C | 2007-06-08 | 1L | § 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR ENTIRE CEILING IN THE KITCHEN LOCATED AT APT 1L, 1st STORY, APARTMENT AT SOUTH |
| Open First No Access To Re- Inspect Violation · 2025-04-15 | C | 2007-06-08 | 1L | § 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR NORTH WALL AND CEILING IN THE BATHROOM LOCATED AT APT 1L, 1st STORY, APARTMENT AT SOUTH |
| Open First No Access To Re- Inspect Violation · 2025-04-15 | C | 2007-04-30 | 1R | § 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR AT CEILING IN THE BATHROOM LOCATED AT APT 1R, 1st STORY, 1st APARTMENT FROM SOUTH AT WEST |
| Closed Violation Dismissed · 2025-07-07 | C | 2025-04-16 | 1R | § 27-2005, 27-2007, 27-2041.1 HMC, §238, § 309; § 107 (2) ( C) MDL AND 28 RCNY §25-171: REPLACE OR REPAIR THE SELF-CLOSING DOORS THAT IS MISSING OR DEFECTIVE AT LATCHSET ASSEMBLY IN THE ENTRANCE LOCATED AT APT 1R, 1st STORY, 1st APARTMENT FROM SOUTH AT WEST |
| Closed Violation Dismissed · 2021-04-29 | A | 2021-04-09 | (A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPDS WEBSITE, WWW.NYC.GOV\HPD, SEARCH BED BUGS. | |
| Closed Violation Dismissed · 2018-10-24 | I | 2018-10-17 | §27-2107 ADM CODE OWNER FAILED TO FILE A VALID REGISTRATION STATEMENT WITH THE DEPARTMENT AS REQUIRED BY ADM CODE §27-2097 AND IS THEREFORE SUBJECT TO CIVIL PENALTIES, PROHIBITED FROM CERTIFYING VIOLATIONS, AND DENIED THE RIGHT TO RECOVER POSSESSION OF PREMISE | |
| Closed Violation Closed · 2014-07-10 | B | 2014-06-18 | § 27-2040 ADM CODE PROVIDE ADEQUATE LIGHTING AT OR NEAR THE OUTSIDE OF THE FRONT ENTRANCEWAY OF THE BUILDING AND KEEP SAME BURNING FROM SUNSET EVERY DAY TO SUNRISE ON THE DAY FOLLOWING 100 WATTS MINIMUM REQUIRES (LIGHT FIXTURES PRESENT) | |
| Closed Violation Dismissed · 2013-09-06 | B | 2013-06-10 | § 27-2040 ADM CODE PROVIDE ADEQUATE LIGHTING AT OR NEAR THE OUTSIDE OF THE FRONT ENTRANCEWAY OF THE BUILDING AND KEEP SAME BURNING FROM SUNSET EVERY DAY TO SUNRISE ON THE DAY FOLLOWING ***MINIMUM 100 WATTS OF INCANDESCENT LIGHT REQUIRED..(FIXTURE PRESENT)*** | |
| Closed Violation Dismissed · 2025-04-15 | C | 2008-10-07 | § 27-2005 ADM CODE PROVIDE SEAL ALL ACCESSIBLE OPENINGS ,VACANT BUILDING |
Source: HPD Housing Maintenance Code Violations — city dataset updated 2026-10-31; data as of 2026-10-31
HPD complaints 0
Complaints tenants or others made to HPD (usually via 311) about housing conditions, from 2019 onward. A complaint is not a violation; HPD may inspect and issue one.
No records found in this dataset for this lot.
Source: HPD Housing Maintenance Code Complaints and Problems — city dataset updated 2026-10-31; data as of 2026-10-31
311 requests (last 12 months) 3
Recent 311 service requests the city geocoded to this lot: noise, illegal parking, heat, sanitation and more. Anyone can file them, so they describe activity at or near the address, not necessarily the building itself.
| Opened | Agency | Complaint | Status | Closed |
|---|---|---|---|---|
| 2025-12-06 | NYPD | Noise - Street/Sidewalk – Loud Music/Party | Closed | 2025-12-06 |
| 2025-12-03 | DOT | Street Condition – Plate Condition - Noisy | Closed | 2025-12-04 |
| 2025-11-28 | DOT | Street Condition – Plate Condition - Noisy | Closed | 2025-12-04 |
Source: 311 Service Requests from 2020 to Present — city dataset updated 2026-10-31; data as of 2026-10-31
Nearby properties
On Halsey St
- 1312 Halsey Street (15 open items)
- 1314 Halsey Street (65 open items)
- 1311 Halsey Street (11 open items)
- 1310 Halsey Street (25 open items)
- 1316 Halsey Street (nine open items)
- 1317 Halsey Street (34 open items)
- 1309 Halsey Street (one open item)
- 1318 Halsey Street (10 open items)
- 1319 Halsey Street (36 open items)
- 1320 Halsey Street (41 open items)
Same tax block (3406)
- 783 Knickerbocker Avenue (12 open items)
- 290 Weirfield Street
- 292 Weirfield Street
- 294 Weirfield Street (five open items)
- 296 Weirfield Street
- 298 Weirfield Street
- 300 Weirfield Street
- 302 Weirfield Street (two open items)
- 304 Weirfield Street
- 306 Weirfield Street
All properties on Halsey St, Brooklyn · All of Brooklyn 11237 (Bushwick (West))
Open-item counts as of October 31, 2026; each section lists its own dataset date. Machine-readable: JSON API · Markdown · API & MCP docs