133 Eldridge Street, Manhattan, NY 10002
BBL 1004190068 (Borough 1, Block 419, Lot 68) · BIN 1005592 · Last updated:
Summary · as of October 31, 2026
133 Eldridge Street (Manhattan, NY 10002; tax lot BBL 1004190068) is a 2-unit mixed-use building with apartments and ground-floor commercial space (building class S2: mixed-use: two-family home with one store or office), built around 1900, on a 2,700 sq ft lot zoned C4-4A. City tax records list the owner as 133 ELDRIDGE STREET LLC; per ACRIS, a deed to this owner dated September 26, 2024 lists a price of $5,950,000. The Department of Finance's final market value for tax year 2027 is $21,119,000. As of October 31, 2026, NYC Open Data shows nine DOB jobs with a permit issued but no sign-off and two active DOB violations. There were seven 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
- 133 ELDRIDGE STREET LLC
- Building class
- S2 · Mixed-use: two-family home with one store or office
- Year built · units
- 1900 · 2 res.
- Lot area · zoning
- 2,700 sq ft · C4-4A
- Market value (DOF)
- $21,119,000 FY2027
- Last priced deed
- $5,950,000 · 2024-09-26
- BBL
- 1004190068
- BIN
- 1005592
- 9Open DOB jobs (permit issued, no sign-off)
- 2Active DOB violations
- 0Active ECB violations
- 0Open HPD violations
- 0OATH tickets with unpaid balance
How to cite: NYC Property Facts, “133 Eldridge Street, Manhattan, NY 10002 (BBL 1004190068)”, data as of 2026-10-31, https://nycpropertyfacts.com/ny/manhattan/133-eldridge-street-1004190068. 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)
- 133 ELDRIDGE STREET LLCThe owner name on the city’s tax records. It can lag behind recent sales and is often an LLC.
- Building class
- S2 – Mixed-use: two-family home with one store or officeThe Department of Finance’s category for what kind of building this is.
- Land use
- Mixed residential & commercialCity Planning’s broad category of how the lot is used.
- Year built
- 1900Often an estimate for older buildings.
- Floors
- 5
- Units
- 2 residential / 3 totalResidential units are apartments; total includes stores and offices.
- Buildings on lot
- 1
- Lot size
- 2,700 sq ft (27 ft × 100 ft)
- Building floor area
- 11,078 sq ft (incl. 4,000 sq ft commercial)
- Zoning
- C4-4AThe zoning district sets what can be built and used here. Commercial district.
- Built vs. allowed density (FAR)
- 4.10 built / 4.00 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 1004190068 (Borough 1, Block 419, Lot 68) · BIN 1005592BBL 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 2026-11-02; Building Footprints — city dataset updated 2026-10-25; data as of 2026-11-01
Tax assessment
How the Department of Finance values this lot for property tax.
- Market value (tax year 2027, final roll)
- $21,119,000The 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
- $1,267,140The portion of market value that taxes are calculated on (capped by law for small homes).
- Taxable value (final)
- $125,411Assessed value minus any exemptions.
- Tax class
- Tax class 1 – 1–3 family homes (and some small mixed-use / vacant lots)
| Tax year | Roll | Market value | Assessed value | Tax class |
|---|---|---|---|---|
| 2027 | Final | $21,119,000 | $1,267,140 | 1 |
| 2026 | Final | $21,283,000 | $1,276,980 | 1 |
| 2025 | Final | $19,763,000 | $1,185,780 | 1 |
Source: DOF Property Valuation and Assessment Data — city dataset updated 2026-09-14; data as of 2026-11-02
Sales & deed history 8
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 |
|---|---|---|---|---|---|
| 2024-09-26 | DEED | $5,950,000 | 133 Eldridge Holdings Llc | 133 Eldridge Street Llc | 2024092700309001 |
| 2023-01-23 | DEED | $5,500,000 | Schuselka, Elfriede; Capobianco, Domenick | 133 Eldridge Holdings Llc | 2023020701055001 |
| 1983-09-01 | DEED | $0 / not stated | Sobel, Fay; Sobel, Henry L. | Schuselka, Elfriede; Capobianco, Dominick | FT_1130000041113 |
| 1983-02-25 | DEED | $0 / not stated | 133 Eldridge St.Corp. | Sobel, Henry L.; Sobel, Fay | FT_1420000024742 |
| 1979-06-29 | DEED | $0 / not stated | King Morpheus Products | Sobel, Harry L; Sobel, Fay | FT_1560008609056 |
| 1978-10-06 | DEED | $0 / not stated | 105 107 Eldridge Street | King Morpheus Products | FT_1120008596412 |
| 1973-06-14 | DEED | $0 / not stated | 105 107 Eldridge Street | 133 Eldridge St Corp | FT_1040008521904 |
| 1971-04-21 | DEED | $0 / not stated | Sephardic Jew Brthretal | 105-107 Eldridge Stcorp | FT_1050008487505 |
Source: ACRIS Real Property Master — city dataset updated 2026-10-08; data as of 2026-11-02; ACRIS Real Property Legals — city dataset updated 2026-10-08; data as of 2026-11-02; ACRIS Real Property Parties — city dataset updated 2026-10-08; data as of 2026-11-02
DOB job filings 9 open of 20
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 · 2025-09-23 | 141028572 BIS | A3 – Minor alteration (one type of work) | 2025-08-28 | — |
| Permitted, not signed off Permit Entire · 2026-01-26 | M01208659-S4 DOB NOW | ALT-CO - New Building with Existing Elements to Remain | 2025-07-07 | $200,000 |
| Permitted, not signed off Permit Entire · 2026-01-20 | M01208659-S3 DOB NOW | ALT-CO - New Building with Existing Elements to Remain | 2025-06-09 | $70,000 |
| Permitted, not signed off Permit Entire · 2026-01-09 | M01208659-S2 DOB NOW | ALT-CO - New Building with Existing Elements to Remain | 2025-06-05 | $130,000 |
| Permitted, not signed off Permit Entire · 2026-01-22 | M01208659-S1 DOB NOW | ALT-CO - New Building with Existing Elements to Remain | 2025-06-05 | $100,000 |
| Permitted, not signed off Permit Entire · 2026-02-19 | M01208659-I1 DOB NOW | ALT-CO - New Building with Existing Elements to Remain | 2025-04-14 | $1,862,790 |
| Permitted, not signed off Permit Issued · 2025-11-06 | M01123368-I1 DOB NOW | Alteration | 2024-10-10 | $200,000 |
| Permitted, not signed off PERMIT ISSUED - ENTIRE JOB/WORK · 2006-04-14 | 104406206 BIS | A2 – Alteration with multiple work types (no change to use/occupancy) | 2006-04-13 | — |
| Permitted, not signed off PERMIT ISSUED - ENTIRE JOB/WORK · 1995-03-17 | 100800689 BIS | A1 – Major alteration (changes use, egress or occupancy) | 1994-03-22 | $27,000 |
| Not open Prof Cert QA Review · 2026-10-30 | M01469902-S3 DOB NOW | Alteration | 2026-10-29 | $90,000 |
| Not open Approved · 2026-10-30 | M01469902-S1 DOB NOW | Alteration | 2026-10-29 | $70,000 |
| Not open Approved · 2026-10-30 | M01469902-I1 DOB NOW | Alteration | 2026-10-29 | $180,000 |
| Not open Approved · 2026-10-30 | M01469902-S2 DOB NOW | Alteration | 2026-10-29 | $120,000 |
| Not open Objections · 2026-05-26 | M01208659-P2 DOB NOW | ALT-CO - New Building with Existing Elements to Remain | 2026-05-05 | $90,000 |
| Not open Objections · 2026-05-26 | M01208659-P3 DOB NOW | ALT-CO - New Building with Existing Elements to Remain | 2026-05-05 | $100,000 |
| Not open Plan Examiner Review · 2026-10-09 | M01208659-P1 DOB NOW | ALT-CO - New Building with Existing Elements to Remain | 2026-02-05 | $1,862,790 |
| Not open Filing Withdrawn · 2026-02-12 | M01121100-I1 DOB NOW | Alteration CO | 2024-10-09 | $1,282,590 |
| Not open LOC Issued · 2023-01-16 | M00034576-I1 DOB NOW | Alteration | 2018-04-18 | $5,000 |
| Not open SIGNED OFF · 2008-05-15 | 110052754 BIS | A2 – Alteration with multiple work types (no change to use/occupancy) | 2007-12-19 | $35,000 |
| Not open Filing Withdrawn · 2025-05-15 | M01123368-P1 DOB NOW | Alteration | — | $200,000 |
Source: DOB NOW: Build – Job Application Filings — city dataset updated 2026-11-01; data as of 2026-11-02; DOB Job Application Filings (BIS) — city dataset updated 2026-10-30; data as of 2026-10-31
Work permits 18
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 |
|---|---|---|---|---|
| 2026-02-19 | 2027-02-13 | M01208659-I1 DOB NOW | General Construction Proposed vertical extension of existing building as per plan, change of use from 2 to 8 dwelling. Obtain a new CO | Permit Issued |
| 2026-01-26 | 2027-01-26 | M01208659-S4 DOB NOW | Structural Proposed structural work of existing 5 story building as per plan. No change in use, egress, or occupancy under this application. | Permit Issued |
| 2026-01-22 | 2026-12-22 | M01208659-S1 DOB NOW | Plumbing Plumbing work filed in conjunction with the alteration CO application as per plan. No change in use, egress, or occupancy. | Permit Issued |
| 2026-01-20 | 2026-12-22 | M01208659-S3 DOB NOW | Sprinklers Sprinkler work filed in conjunction with the Alt CO application as per plan. No change in use, egress, or occupancy. | Permit Issued |
| 2026-01-09 | 2027-01-09 | M01208659-S2 DOB NOW | Mechanical Systems Mechanical work filed in conjunction with the alteration CO application as per plan. No change in use, egress, or occupancy. | Permit Issued |
| 2026-01-05 | 2026-02-13 | M01208659-I1 DOB NOW | General Construction Proposed vertical extension of existing building as per plan, change of use from 2 to 8 dwelling. Obtain a new CO | Permit Issued |
| 2025-11-06 | 2026-11-06 | M01123368-I1 DOB NOW | General Construction Proposed structural work of existing 5 story building as per plan. No change in use, egress, or occupancy under this application. | Permit Issued |
| 2025-11-06 | 2026-11-06 | M01123368-I1 DOB NOW | Structural Proposed structural work of existing 5 story building as per plan. No change in use, egress, or occupancy under this application. | Permit Issued |
| 2024-12-06 | 2025-12-06 | M01123368-I1 DOB NOW | General Construction Proposed structural work of existing 5 story building as per plan. No change in use, egress, or occupancy under this application. | Permit Issued |
| 2024-12-06 | 2025-12-06 | M01123368-I1 DOB NOW | Structural Proposed structural work of existing 5 story building as per plan. No change in use, egress, or occupancy under this application. | Permit Issued |
| 2018-04-18 | 2019-04-18 | M00034576-I1 DOB NOW | Sidewalk Shed INSTALLATION OF HEAVY DUTY SIDEWALK SHED AS PER PLANS. LIVE LOAD 300 PSF. SIDEWALK SHED SHALL COMPLY WITH CHAPTER #33 OF THE 2014 CODE NO CHANGE TO USE, EGRESS | Signed-off |
| 2008-01-28 | 2008-11-19 | 110052754 BIS | Equipment work / Other / general construction | ISSUED (initial) |
Showing 12 of 18 records. The API and the source dataset have the full list.
Source: DOB NOW: Build – Approved Permits — city dataset updated 2026-11-02; data as of 2026-11-02; DOB Permit Issuance (BIS) — city dataset updated 2026-10-31; data as of 2026-10-31
DOB violations 2 active of 4
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 | 2025-11-14 | LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED | VIOLATION ISSUED-FAILURE TO FILE 2024 EXTERNAL LOW PRESSURE INSPECTION | V111425LBLVIO02014 |
| Active V-DOB VIOLATION - ACTIVE | 2023-06-30 | LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED | VIOLATION ISSUED-FAILURE TO FILE 2020 EXTERNAL LOW PRESSURE INSPECTION | V063023LBLVIO05302 |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 2009-12-31 | LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED | V*123109LBLVIO00608 | |
| Resolved/dismissed V*-DOB VIOLATION - DISMISSED | 2008-01-03 | LL6291-LOCAL LAW 62/91 - BOILERS BOILER REQUIRED | V*010308LL629103193 |
Source: DOB Violations — city dataset updated 2026-11-02; data as of 2026-11-02
ECB violations (DOB) 0 active of 4
DOB violations that go to a hearing at OATH (formerly the Environmental Control Board) and can carry fines. Active or Resolved follows the DOB violation status field. The hearing status is about the hearing and its penalty: written off means the city stopped collecting the fine, not that the condition was corrected. A balance due is a fine the city says is unpaid.
| Status | Issued | Severity | What it was for | Penalty / paid / balance | ECB # |
|---|---|---|---|---|---|
| Resolved Hearing: IN VIOLATION · Certification: CERTIFICATE ACCEPTED | 2018-05-30 | CLASS - 2 | PEDESTRIAN PROTECTION DOESN'T MEET CODE SPECIFICATION. NOTE: AT TIME OF INSPECTION OBSERVED SIDE WALK SHED IN PLACE WITH THE FOLLOWING VIOLATING CONDITIONS. SIDEWALK SHED VERTICAL MEMBER SHALL NOT BE PLACED | $2,400 / $1,800 / $0 | 35324125M |
| Resolved Hearing: IN VIOLATION · Certification: CERTIFICATE ACCEPTED | 2016-07-15 | CLASS - 2 | FAILURE TO MAINTAIN BUILDING IN CODE COMPLIANT MANNER:APPURTENANCE PROJECTING MORE THAN 10" AS PER BC 3202.2.1.2(Z)NOTED:AT EXP# 1,GROND FL BELOW 1ST FL FIRE ESCAPE,FOUR OF A/C UNITS(SPLIT UNITS)MOUNTED ON BRAC | $500 / $500 / $0 | 35167091R |
| Resolved Hearing: ADMIT/IN-VIO · Certification: CERTIFICATE ACCEPTED | 2025-01-30 | CLASS - 2 | OBSERVED IN BASEMENT CORROSION ON GAS LINE ALSO LACK SUPPORT ON GAS LINE WHICH IS CONTRARY TO CODE SECTIONS FGC 407.2 AND FGC 404.11, REPAIRAND/OR REPLACE | $625 / $625 / $0 | 39136917H |
| Resolved Hearing: IN VIOLATION · Certification: CERTIFICATE ACCEPTED | 2016-07-15 | CLASS - 2 | WORK W/OUT PERMIT AT EXP#1 BETWEEN GROUND FLOOR AND 1ST(UNDER FIRE ESCAPE)INSTALLED 4 OF SPLIT SYSTEMS A/C CONDENSER UNITS WITH SUPPORTING BRACKETS ATTACHED TO FACADE PROJECTING MORE THAN 10" W/OUT DEPT OF TRAN | $800 / $800 / $0 | 35167092Z |
Source: DOB ECB Violations — city dataset updated 2026-10-31; data as of 2026-11-02
OATH tickets (all agencies) 0 unpaid of 45
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 | 2026-05-20 | Sanitation Others | FAILURE TO CLEAN 18 INCHES INTO STREET | 133 ELDRIDGE STREET LLC | $50 / $50 / $0 | 049717274L |
| No balance due PAID IN FULL | 2025-09-09 | Sanitation Recycling | FAILURE TO CLEAN 18 INCHES INTO STREET | 133 ELDRIDGE STREET LLC | $50 / $50 / $0 | 049267271K |
| No balance due PAID IN FULL | 2025-08-30 | Sanitation Others | FAILURE TO CLEAN 18 INCHES INTO STREET | 133 ELDRIDGE STREET LLC | $50 / $50 / $0 | 049158700R |
| No balance due PAID IN FULL · ADMIT IN-VIO | 2025-08-27 | Dep - Bureau Of Env. Complianc | FAIL TO KEEP HAVE AVAILABLE FOR INSPECTION NOISE MITIGATION PLAN | ZAF CORPORATION | $440 / $440 / $0 | 000606850K |
| No balance due PAID IN FULL | 2025-03-03 | Sanitation Others | FAILURE TO CLEAN 18 INCHES INTO STREET | 133 ELDRIDGE STREET LLC | $50 / $50 / $0 | 048749594K |
| No balance due PAID IN FULL | 2025-03-01 | Sanitation Others | DIRTY SIDEWALK | 133 ELDRIDGE STREET LLC | $50 / $50 / $0 | 048878007H |
| No balance due PAID IN FULL · ADMIT IN-VIO | 2025-01-30 | Dept. Of Buildings | FAILURE TO MAINTAIN BUILDING IN CODE-COMPLIANT MANNER | 133 ELDRIDGE STREET LLC | $625 / $625 / $0 | 039136917H |
| No balance due PAID IN FULL | 2024-09-12 | Sanitation Others | DIRTY SIDEWALK | 133 ELDRIDGE HOLDINGS LLC | $50 / $50 / $0 | 048505956H |
| No balance due PAID IN FULL | 2024-07-23 | Sanitation Others | FAILURE TO CLEAN 18 INCHES INTO STREET | 133 ELDRIDGE HOLDINGS LLC | $50 / $50 / $0 | 048339928J |
| No balance due PAID IN FULL | 2024-02-09 | Sanitation Others | LOOSE RUBBISH 1ST OCCURRENCE | 133 ELDRIDGE HOLDINGS LLC | $50 / $50 / $0 | 048100597J |
| No balance due PAID IN FULL | 2023-12-26 | Sanitation Others | DIRTY SIDEWALK | 133 ELDRIDGE HOLDINGS LLC | $50 / $50 / $0 | 047983974L |
| No balance due PAID IN FULL | 2023-12-08 | Sanitation Others | FAILURE TO CLEAN 18 INCHES INTO STREET | 133 ELDRIDGE HOLDINGS LLC | $50 / $50 / $0 | 048041287R |
Showing 12 of 45 records. The API and the source dataset have the full list.
Source: OATH Hearings Division Case Status — city dataset updated 2026-11-02; data as of 2026-11-02
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
- 21341
- Last registered
- 2026-08-05
- Registration valid until
- 2027-09-01 CurrentRegistrations must be renewed every year.
| Role | Name | Company | Business city |
|---|---|---|---|
| Agent | George Lau | Brooklyn, Ny | |
| Corporateowner | 133 Eldridge Street LLC | Brooklyn, Ny | |
| Headofficer | George Lau | Brooklyn, Ny | |
| Sitemanager | George Lau | ||
| Shareholder | James Lau | Brooklyn, Ny |
Source: HPD Multiple Dwelling Registrations — city dataset updated 2026-10-28; data as of 2026-11-02; HPD Registration Contacts — city dataset updated 2026-10-28; data as of 2026-11-02
HPD housing-code violations 0 open of 0
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.
No records found in this dataset for this lot.
Source: HPD Housing Maintenance Code Violations — city dataset updated 2026-11-02; data as of 2026-11-02
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 2026-11-02; data as of 2026-11-02
311 requests (last 12 months) 7
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 |
|---|---|---|---|---|
| 2026-10-13 | NYPD | Noise - Street/Sidewalk – Loud Music/Party | Closed | 2026-10-13 |
| 2026-09-07 | DEP | Noise – Construction Equipment | Closed | 2026-09-10 |
| 2026-09-03 | DEP | Noise – Construction Equipment | Closed | 2026-09-04 |
| 2026-07-15 | NYPD | Noise - Vehicle – Engine Idling | Closed | 2026-07-15 |
| 2026-05-01 | DEP | Noise – Noise: Manufacturing Noise (NK1) | Closed | 2026-05-21 |
| 2026-04-17 | NYPD | Noise - Street/Sidewalk – Loud Music/Party | Closed | 2026-04-17 |
| 2025-12-10 | DSNY | Graffiti – Graffiti | Closed | 2025-12-15 |
Source: 311 Service Requests from 2020 to Present — city dataset updated 2026-11-02; data as of 2026-11-02
Nearby properties
On Eldridge St
- 134 Eldridge Street (eight open items)
- 135 Eldridge Street (25 open items)
- 131 Eldridge Street (three open items)
- 136 Eldridge Street (46 open items)
- 129 Eldridge Street (five open items)
- 138 Eldridge Street (four open items)
- 128 Eldridge Street (19 open items)
- 139 Eldridge Street (59 open items)
- 140 Eldridge Street (15 open items)
- 116 Eldridge Street (81 open items)
Same tax block (419)
- 110 Forsyth Street (79 open items)
- 118 Forsyth Street (16 open items)
- 120 Forsyth Street (89 open items)
- 122 Forsyth Street (25 open items)
- 124 Forsyth Street (25 open items)
- 43 Delancey Street (14 open items)
- 47 Delancey Street (13 open items)
- 139 Eldridge Street (59 open items)
- 135 Eldridge Street (25 open items)
- 131 Eldridge Street (three open items)
All properties on Eldridge St, Manhattan · All of Manhattan 10002 (Lower East Side)
Open-item counts as of October 31, 2026; each section lists its own dataset date. Machine-readable: JSON API · Markdown · Plain text · API & MCP docs